configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016, 2019 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include(config/ax_cxx_compile_stdcxx.m4)
  27 m4_include(config/gcc-plugin.m4)
  28 m4_include([libtool.m4])
  29 m4_include([ltoptions.m4])
  30 m4_include([ltsugar.m4])
  31 m4_include([ltversion.m4])
  32 m4_include([lt~obsolete.m4])
  33 m4_include([config/isl.m4])
  34
  35 AC_INIT(move-if-change)
  36 AC_DISABLE_OPTION_CHECKING
  37
  38 progname=$0
  39 # if PWD already has a value, it is probably wrong.
  40 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  41
  42 # Export original configure arguments for use by sub-configures.
  43 # Quote arguments with shell meta charatcers.
  44 TOPLEVEL_CONFIGURE_ARGUMENTS=
  45 set -- "$progname" "$@"
  46 for ac_arg
  47 do
  48   case "$ac_arg" in
  49   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  50     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  51     # if the argument is of the form -foo=baz, quote the baz part only
  52     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  53   *) ;;
  54   esac
  55   # Add the quoted argument to the list.
  56   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  57 done
  58 if test "$silent" = yes; then
  59   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  60 fi
  61 # Remove the initial space we just introduced and, as these will be
  62 # expanded by make, quote '$'.
  63 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  64 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  65
  66 # Find the build, host, and target systems.
  67 ACX_NONCANONICAL_BUILD
  68 ACX_NONCANONICAL_HOST
  69 ACX_NONCANONICAL_TARGET
  70
  71 dnl Autoconf 2.5x and later will set a default program prefix if
  72 dnl --target was used, even if it was the same as --host.  Disable
  73 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  74 dnl to take effect.
  75 test "$host_noncanonical" = "$target_noncanonical" &&
  76   test "$program_prefix$program_suffix$program_transform_name" = \
  77     NONENONEs,x,x, &&
  78   program_transform_name=s,y,y,
  79
  80 AC_CANONICAL_SYSTEM
  81 AC_ARG_PROGRAM
  82
  83 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  84 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  85
  86 # Get 'install' or 'install-sh' and its variants.
  87 AC_PROG_INSTALL
  88 ACX_PROG_LN
  89 AC_PROG_LN_S
  90 AC_PROG_SED
  91 AC_PROG_AWK
  92
  93 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  94
  95 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  96 # a relative path.
  97 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  98   INSTALL="${srcpwd}/install-sh -c"
  99 fi
 100
 101 # Set srcdir to "." if that's what it is.
 102 # This is important for multilib support.
 103 pwd=`${PWDCMD-pwd}`
 104 if test "${pwd}" = "${srcpwd}" ; then
 105   srcdir=.
 106 fi
 107
 108 topsrcdir=$srcpwd
 109
 110 extra_host_args=
 111
 112 ### To add a new directory to the tree, first choose whether it is a target
 113 ### or a host dependent tool.  Then put it into the appropriate list
 114 ### (library or tools, host or target), doing a dependency sort.
 115
 116 # Subdirs will be configured in the order listed in build_configdirs,
 117 # configdirs, or target_configdirs; see the serialization section below.
 118
 119 # Dependency sorting is only needed when *configuration* must be done in
 120 # a particular order.  In all cases a dependency should be specified in
 121 # the Makefile, whether or not it's implicitly specified here.
 122
 123 # Double entries in build_configdirs, configdirs, or target_configdirs may
 124 # cause circular dependencies and break everything horribly.
 125
 126 # these library is used by various programs built for the build
 127 # environment
 128 #
 129 build_libs="build-libiberty build-libcpp"
 130
 131 # these tools are built for the build environment
 132 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 133
 134 # these libraries are used by various programs built for the host environment
 135 #f
 136 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libelf libiconv libctf"
 137
 138 # these tools are built for the host environment
 139 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 140 # know that we are building the simulator.
 141 # binutils, gas and ld appear in that order because it makes sense to run
 142 # "make check" in that particular order.
 143 # If --enable-gold is used, "gold" may replace "ld".
 144 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools c++tools"
 145
 146 # these libraries are built for the target environment, and are built after
 147 # the host libraries and the host tools (which may be a cross compiler)
 148 # Note that libiberty is not a target library.
 149 target_libraries="target-libgcc \
 150                 target-libbacktrace \
 151                 target-libgloss \
 152                 target-newlib \
 153                 target-libgomp \
 154                 target-liboffloadmic \
 155                 target-libatomic \
 156                 target-libitm \
 157                 target-libstdc++-v3 \
 158                 target-libsanitizer \
 159                 target-libvtv \
 160                 target-libssp \
 161                 target-libquadmath \
 162                 target-libgfortran \
 163                 target-libffi \
 164                 target-libobjc \
 165                 target-libada \
 166                 target-libgo \
 167                 target-libphobos \
 168                 target-zlib"
 169
 170 # these tools are built using the target libraries, and are intended to
 171 # run only in the target environment
 172 #
 173 # note: any program that *uses* libraries that are in the "target_libraries"
 174 # list belongs in this list.
 175 #
 176 target_tools="target-rda"
 177
 178 ################################################################################
 179
 180 ## All tools belong in one of the four categories, and are assigned above
 181 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 182 ## is important because configure will choke if they ever get through.
 183 ## ${configdirs} is directories we build using the host tools.
 184 ## ${target_configdirs} is directories we build using the target tools.
 185 configdirs=`echo ${host_libs} ${host_tools}`
 186 target_configdirs=`echo ${target_libraries} ${target_tools}`
 187 build_configdirs=`echo ${build_libs} ${build_tools}`
 188
 189 m4_divert_text([PARSE_ARGS],
 190 [case $srcdir in
 191   *" "*)
 192 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 193     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 194 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 195     ;;
 196 esac
 197 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 198 ])
 199
 200 ################################################################################
 201
 202 srcname="gnu development package"
 203
 204 # This gets set non-empty for some net releases of packages.
 205 appdirs=""
 206
 207 # Define is_cross_compiler to save on calls to 'test'.
 208 is_cross_compiler=
 209 if test x"${host}" = x"${target}" ; then
 210   is_cross_compiler=no
 211 else
 212   is_cross_compiler=yes
 213 fi
 214
 215 # Find the build and target subdir names.
 216 GCC_TOPLEV_SUBDIRS
 217 # Be sure to cover against remnants of an in-tree build.
 218 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 219   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 220 Use a pristine source tree when building in a separate tree])
 221 fi
 222
 223 # Skipdirs are removed silently.
 224 skipdirs=
 225 # Noconfigdirs are removed loudly.
 226 noconfigdirs=""
 227
 228 use_gnu_ld=
 229 # Make sure we don't let GNU ld be added if we didn't want it.
 230 if test x$with_gnu_ld = xno ; then
 231   use_gnu_ld=no
 232   noconfigdirs="$noconfigdirs ld gold"
 233 fi
 234
 235 use_gnu_as=
 236 # Make sure we don't let GNU as be added if we didn't want it.
 237 if test x$with_gnu_as = xno ; then
 238   use_gnu_as=no
 239   noconfigdirs="$noconfigdirs gas"
 240 fi
 241
 242 use_included_zlib=
 243 AC_ARG_WITH(system-zlib,
 244 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 245 # Make sure we don't let ZLIB be added if we didn't want it.
 246 if test x$with_system_zlib = xyes ; then
 247   use_included_zlib=no
 248   noconfigdirs="$noconfigdirs zlib"
 249 fi
 250
 251 # some tools are so dependent upon X11 that if we're not building with X,
 252 # it's not even worth trying to configure, much less build, that tool.
 253
 254 case ${with_x} in
 255   yes | "") ;; # the default value for this tree is that X11 is available
 256   no)
 257     skipdirs="${skipdirs} tk itcl libgui"
 258     # We won't be able to build gdbtk without X.
 259     enable_gdbtk=no
 260     ;;
 261   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 262 esac
 263
 264 # Some are only suitable for cross toolchains.
 265 # Remove these if host=target.
 266 cross_only="target-libgloss target-newlib target-opcodes"
 267
 268 case $is_cross_compiler in
 269   no) skipdirs="${skipdirs} ${cross_only}" ;;
 270 esac
 271
 272 # If both --with-headers and --with-libs are specified, default to
 273 # --without-newlib.
 274 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 275    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 276   if test x"${with_newlib}" = x ; then
 277     with_newlib=no
 278   fi
 279 fi
 280
 281 # Recognize --with-newlib/--without-newlib.
 282 case ${with_newlib} in
 283   no) skipdirs="${skipdirs} target-newlib" ;;
 284   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 285 esac
 286
 287 AC_ARG_ENABLE(as-accelerator-for,
 288 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 289                 [build as offload target compiler.
 290                 Specify offload host triple by ARG])])
 291
 292 AC_ARG_ENABLE(offload-targets,
 293 [AS_HELP_STRING([--enable-offload-targets=LIST],
 294                 [enable offloading to devices from comma-separated LIST of
 295                 TARGET[=DIR]. Use optional path to find offload target compiler
 296                 during the build])],
 297 [
 298   if test x"$enable_offload_targets" = x; then
 299     AC_MSG_ERROR([no offload targets specified])
 300   fi
 301 ], [enable_offload_targets=])
 302
 303 AC_ARG_ENABLE(offload-defaulted,
 304 [AS_HELP_STRING([--enable-offload-defaulted]
 305                 [If enabled, configured but not installed offload compilers and
 306                 libgomp plugins are silently ignored.  Useful for distribution
 307                 compilers where those are in separate optional packages.])],
 308 [enable_offload_defaulted=$enableval],
 309 [enable_offload_defaulted=])
 310
 311 # Handle --enable-gold, --enable-ld.
 312 # --disable-gold [--enable-ld]
 313 #     Build only ld.  Default option.
 314 # --enable-gold [--enable-ld]
 315 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 316 #     as "ld.bfd" and "ld".
 317 # --enable-gold=default [--enable-ld]
 318 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 319 #     install ld as "ld.bfd".
 320 # --enable-gold[=default] --disable-ld
 321 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 322 # --enable-gold --enable-ld=default
 323 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 324 #     and ld.bfd).
 325 #     In other words, ld is default
 326 # --enable-gold=default --enable-ld=default
 327 #     Error.
 328
 329 default_ld=
 330 AC_ARG_ENABLE(gold,
 331 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 332                 [build gold @<:@ARG={default,yes,no}@:>@])],
 333 ENABLE_GOLD=$enableval,
 334 ENABLE_GOLD=no)
 335 case "${ENABLE_GOLD}" in
 336   yes|default)
 337     # Check for ELF target.
 338     is_elf=no
 339     case "${target}" in
 340       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 341       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 342       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 343       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 344         case "${target}" in
 345           *-*-linux*aout* | *-*-linux*oldld*)
 346             ;;
 347           *)
 348             is_elf=yes
 349             ;;
 350         esac
 351     esac
 352
 353     if test "$is_elf" = "yes"; then
 354       # Check for target supported by gold.
 355       case "${target}" in
 356         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 357         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 358           configdirs="$configdirs gold"
 359           if test x${ENABLE_GOLD} = xdefault; then
 360             default_ld=gold
 361           fi
 362           ENABLE_GOLD=yes
 363           ;;
 364       esac
 365     fi
 366     ;;
 367   no)
 368     ;;
 369   *)
 370     AC_MSG_ERROR([invalid --enable-gold argument])
 371     ;;
 372 esac
 373
 374 AC_ARG_ENABLE(ld,
 375 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 376                 [build ld @<:@ARG={default,yes,no}@:>@])],
 377 ENABLE_LD=$enableval,
 378 ENABLE_LD=yes)
 379
 380 case "${ENABLE_LD}" in
 381   default)
 382     if test x${default_ld} != x; then
 383       AC_MSG_ERROR([either gold or ld can be the default ld])
 384     fi
 385     ;;
 386   yes)
 387     ;;
 388   no)
 389     if test x${ENABLE_GOLD} != xyes; then
 390       AC_MSG_WARN([neither ld nor gold are enabled])
 391     fi
 392     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 393     ;;
 394   *)
 395     AC_MSG_ERROR([invalid --enable-ld argument])
 396     ;;
 397 esac
 398
 399 # PR gas/19109
 400 # Decide the default method for compressing debug sections.
 401 # Provide a configure time option to override our default.
 402 AC_ARG_ENABLE(compressed_debug_sections,
 403 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 404                 [Enable compressed debug sections for gas, gold or ld by
 405                  default])],
 406 [
 407   if test x"$enable_compressed_debug_sections" = xyes; then
 408     AC_MSG_ERROR([no program with compressed debug sections specified])
 409   fi
 410 ], [enable_compressed_debug_sections=])
 411
 412 # Configure extra directories which are host specific
 413
 414 case "${host}" in
 415   *-cygwin*)
 416     configdirs="$configdirs libtermcap" ;;
 417 esac
 418
 419 # A target can indicate whether a language isn't supported for some reason.
 420 # Only spaces may be used in this macro; not newlines or tabs.
 421 unsupported_languages=
 422
 423 # Remove more programs from consideration, based on the host or
 424 # target this usually means that a port of the program doesn't
 425 # exist yet.
 426
 427 case "${host}" in
 428   i[[3456789]]86-*-msdosdjgpp*)
 429     noconfigdirs="$noconfigdirs tcl tk itcl"
 430     ;;
 431 esac
 432
 433
 434 AC_ARG_ENABLE(libquadmath,
 435 AS_HELP_STRING([--disable-libquadmath],
 436   [do not build libquadmath directory]),
 437 ENABLE_LIBQUADMATH=$enableval,
 438 ENABLE_LIBQUADMATH=yes)
 439 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 440   noconfigdirs="$noconfigdirs target-libquadmath"
 441 fi
 442
 443
 444 AC_ARG_ENABLE(libquadmath-support,
 445 AS_HELP_STRING([--disable-libquadmath-support],
 446   [disable libquadmath support for Fortran]),
 447 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 448 ENABLE_LIBQUADMATH_SUPPORT=yes)
 449 enable_libquadmath_support=
 450 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 451   enable_libquadmath_support=no
 452 fi
 453
 454
 455 AC_ARG_ENABLE(libada,
 456 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 457 ENABLE_LIBADA=$enableval,
 458 ENABLE_LIBADA=yes)
 459 if test "${ENABLE_LIBADA}" != "yes" ; then
 460   noconfigdirs="$noconfigdirs gnattools"
 461 fi
 462
 463 AC_ARG_ENABLE(libssp,
 464 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 465 ENABLE_LIBSSP=$enableval,
 466 ENABLE_LIBSSP=yes)
 467
 468 AC_ARG_ENABLE(libstdcxx,
 469 AS_HELP_STRING([--disable-libstdcxx],
 470   [do not build libstdc++-v3 directory]),
 471 ENABLE_LIBSTDCXX=$enableval,
 472 ENABLE_LIBSTDCXX=default)
 473 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 474   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 475 fi]
 476
 477 # If this is accelerator compiler and its target is intelmic we enable
 478 # target liboffloadmic by default.  If this is compiler with offloading
 479 # for intelmic we enable host liboffloadmic by default.  Otherwise
 480 # liboffloadmic is disabled by default.
 481 AC_ARG_ENABLE([liboffloadmic],
 482 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 483                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 484 [case "$enableval" in
 485   no | host | target)
 486     enable_liboffloadmic=$enableval ;;
 487   *)
 488     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 489 esac],
 490 [if test x"$enable_as_accelerator_for" != x; then
 491   case "${target}" in
 492     *-intelmic-* | *-intelmicemul-*)
 493       enable_liboffloadmic=target
 494       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 495       ;;
 496     *)
 497       enable_liboffloadmic=no
 498       ;;
 499   esac
 500 else
 501   case "${enable_offload_targets}" in
 502     *-intelmic-* | *-intelmicemul-*)
 503       enable_liboffloadmic=host
 504       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 505       ;;
 506     *)
 507       enable_liboffloadmic=no
 508       ;;
 509     esac
 510 fi])
 511 AC_SUBST(extra_liboffloadmic_configure_flags)
 512
 513 # Enable libgomp by default on hosted POSIX systems, and a few others.
 514 if test x$enable_libgomp = x ; then
 515     case "${target}" in
 516     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 517         ;;
 518     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 519         ;;
 520     *-*-solaris2* | *-*-hpux11*)
 521         ;;
 522     *-*-darwin* | *-*-aix*)
 523         ;;
 524     nvptx*-*-* | amdgcn*-*-*)
 525         ;;
 526     *)
 527         noconfigdirs="$noconfigdirs target-libgomp"
 528         ;;
 529     esac
 530 fi
 531
 532 # Disable libatomic on unsupported systems.
 533 if test -d ${srcdir}/libatomic; then
 534     if test x$enable_libatomic = x; then
 535         AC_MSG_CHECKING([for libatomic support])
 536         if (srcdir=${srcdir}/libatomic; \
 537                 . ${srcdir}/configure.tgt; \
 538                 test -n "$UNSUPPORTED")
 539         then
 540             AC_MSG_RESULT([no])
 541             noconfigdirs="$noconfigdirs target-libatomic"
 542         else
 543             AC_MSG_RESULT([yes])
 544         fi
 545     fi
 546 fi
 547
 548 # Disable liboffloadmic on unsupported systems.
 549 if test -d ${srcdir}/liboffloadmic; then
 550     if test x$enable_liboffloadmic != xno; then
 551         AC_MSG_CHECKING([for liboffloadmic support])
 552         if (srcdir=${srcdir}/liboffloadmic; \
 553                 . ${srcdir}/configure.tgt; \
 554                 test -n "$UNSUPPORTED")
 555         then
 556             AC_MSG_RESULT([no])
 557             noconfigdirs="$noconfigdirs target-liboffloadmic"
 558         else
 559             AC_MSG_RESULT([yes])
 560         fi
 561     fi
 562 fi
 563
 564 # Disable libitm on unsupported systems.
 565 if test -d ${srcdir}/libitm; then
 566     if test x$enable_libitm = x; then
 567         AC_MSG_CHECKING([for libitm support])
 568         if (srcdir=${srcdir}/libitm; \
 569                 . ${srcdir}/configure.tgt; \
 570                 test -n "$UNSUPPORTED")
 571         then
 572             AC_MSG_RESULT([no])
 573             noconfigdirs="$noconfigdirs target-libitm"
 574         else
 575             AC_MSG_RESULT([yes])
 576         fi
 577     fi
 578 fi
 579
 580 # Disable libsanitizer on unsupported systems.
 581 if test -d ${srcdir}/libsanitizer; then
 582     if test x$enable_libsanitizer = x; then
 583         AC_MSG_CHECKING([for libsanitizer support])
 584         if (srcdir=${srcdir}/libsanitizer; \
 585                 . ${srcdir}/configure.tgt; \
 586                 test -n "$UNSUPPORTED")
 587         then
 588             AC_MSG_RESULT([no])
 589             noconfigdirs="$noconfigdirs target-libsanitizer"
 590         else
 591             AC_MSG_RESULT([yes])
 592         fi
 593     fi
 594 fi
 595
 596 # Disable libvtv on unsupported systems.
 597 if test -d ${srcdir}/libvtv; then
 598     if test x$enable_libvtv = x; then
 599         AC_MSG_CHECKING([for libvtv support])
 600         if (srcdir=${srcdir}/libvtv; \
 601                 . ${srcdir}/configure.tgt; \
 602                 test "$VTV_SUPPORTED" != "yes")
 603         then
 604             AC_MSG_RESULT([no])
 605             noconfigdirs="$noconfigdirs target-libvtv"
 606         else
 607             AC_MSG_RESULT([yes])
 608         fi
 609     fi
 610 fi
 611
 612 # Disable libquadmath for some systems.
 613 case "${target}" in
 614   avr-*-*)
 615     noconfigdirs="$noconfigdirs target-libquadmath"
 616     ;;
 617   # libquadmath is unused on AIX and libquadmath build process use of
 618   # LD_LIBRARY_PATH can break AIX bootstrap.
 619   powerpc-*-aix* | rs6000-*-aix*)
 620     noconfigdirs="$noconfigdirs target-libquadmath"
 621     ;;
 622 esac
 623
 624 # Disable libssp for some systems.
 625 case "${target}" in
 626   avr-*-*)
 627     # No hosted I/O support.
 628     noconfigdirs="$noconfigdirs target-libssp"
 629     ;;
 630   bpf-*-*)
 631     noconfigdirs="$noconfigdirs target-libssp"
 632     ;;
 633   powerpc-*-aix* | rs6000-*-aix*)
 634     noconfigdirs="$noconfigdirs target-libssp"
 635     ;;
 636   pru-*-*)
 637     # No hosted I/O support.
 638     noconfigdirs="$noconfigdirs target-libssp"
 639     ;;
 640   rl78-*-*)
 641     # libssp uses a misaligned load to trigger a fault, but the RL78
 642     # doesn't fault for those - instead, it gives a build-time error
 643     # for explicit misaligned loads.
 644     noconfigdirs="$noconfigdirs target-libssp"
 645     ;;
 646   visium-*-*)
 647     # No hosted I/O support.
 648     noconfigdirs="$noconfigdirs target-libssp"
 649     ;;
 650 esac
 651
 652 # Disable libstdc++-v3 for some systems.
 653 # Allow user to override this if they pass --enable-libstdc++-v3
 654 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 655   case "${target}" in
 656     *-*-vxworks*)
 657       # VxWorks uses the Dinkumware C++ library.
 658       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 659       ;;
 660     amdgcn*-*-*)
 661       # Not ported/fails to build when using newlib.
 662       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 663       ;;
 664     arm*-wince-pe*)
 665       # the C++ libraries don't build on top of CE's C libraries
 666       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 667       ;;
 668     avr-*-*)
 669       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 670       ;;
 671     bpf-*-*)
 672       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 673       ;;
 674     ft32-*-*)
 675       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 676       ;;
 677   esac
 678 fi
 679
 680 # Disable C++ on systems where it is known to not work.
 681 # For testing, you can override this with --enable-languages=c++.
 682 case ,${enable_languages}, in
 683   *,c++,*)
 684     ;;
 685   *)
 686       case "${target}" in
 687         bpf-*-*)
 688           unsupported_languages="$unsupported_languages c++"
 689           ;;
 690       esac
 691       ;;
 692 esac
 693
 694 # Disable Objc on systems where it is known to not work.
 695 # For testing, you can override this with --enable-languages=objc.
 696 case ,${enable_languages}, in
 697   *,objc,*)
 698     ;;
 699   *)
 700       case "${target}" in
 701         bpf-*-*)
 702           unsupported_languages="$unsupported_languages objc"
 703           ;;
 704       esac
 705       ;;
 706 esac
 707
 708 # Disable D on systems where it is known to not work.
 709 # For testing, you can override this with --enable-languages=d.
 710 case ,${enable_languages}, in
 711   *,d,*)
 712     ;;
 713   *)
 714     case "${target}" in
 715       bpf-*-*)
 716         unsupported_languages="$unsupported_languages d"
 717         ;;
 718     esac
 719     ;;
 720 esac
 721
 722 # Disable libphobos on unsupported systems.
 723 # For testing, you can override this with --enable-libphobos.
 724 if test -d ${srcdir}/libphobos; then
 725     if test x$enable_libphobos = x; then
 726         AC_MSG_CHECKING([for libphobos support])
 727         if (srcdir=${srcdir}/libphobos; \
 728                 . ${srcdir}/configure.tgt; \
 729                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 730         then
 731             AC_MSG_RESULT([no])
 732             noconfigdirs="$noconfigdirs target-libphobos"
 733         else
 734             AC_MSG_RESULT([yes])
 735         fi
 736     fi
 737 fi
 738
 739 # Disable Fortran for some systems.
 740 case "${target}" in
 741   mmix-*-*)
 742     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 743     unsupported_languages="$unsupported_languages fortran"
 744     ;;
 745   bpf-*-*)
 746     unsupported_languages="$unsupported_languages fortran"
 747     ;;
 748 esac
 749
 750 # Disable libffi for some systems.
 751 case "${target}" in
 752   powerpc-*-darwin*)
 753     ;;
 754   i[[3456789]]86-*-darwin*)
 755     ;;
 756   x86_64-*-darwin[[912]]*)
 757     ;;
 758   *-*-darwin*)
 759     noconfigdirs="$noconfigdirs target-libffi"
 760     ;;
 761   *-*-netware*)
 762     noconfigdirs="$noconfigdirs target-libffi"
 763     ;;
 764   *-*-phoenix*)
 765     noconfigdirs="$noconfigdirs target-libffi"
 766     ;;
 767   *-*-rtems*)
 768     noconfigdirs="$noconfigdirs target-libffi"
 769     ;;
 770   *-*-tpf*)
 771     noconfigdirs="$noconfigdirs target-libffi"
 772     ;;
 773   *-*-uclinux*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   *-*-vxworks*)
 777     noconfigdirs="$noconfigdirs target-libffi"
 778     ;;
 779   aarch64*-*-freebsd*)
 780     noconfigdirs="$noconfigdirs target-libffi"
 781     ;;
 782   alpha*-*-*vms*)
 783     noconfigdirs="$noconfigdirs target-libffi"
 784     ;;
 785   arm*-*-freebsd*)
 786     noconfigdirs="$noconfigdirs target-libffi"
 787     ;;
 788   arm-wince-pe)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   arm*-*-symbianelf*)
 792     noconfigdirs="$noconfigdirs target-libffi"
 793     ;;
 794   bpf-*-*)
 795     noconfigdirs="$noconfigdirs target-libffi"
 796     ;;
 797   cris-*-* | crisv32-*-*)
 798     case "${target}" in
 799       *-*-linux*)
 800         ;;
 801       *) # See PR46792 regarding target-libffi.
 802         noconfigdirs="$noconfigdirs target-libffi";;
 803     esac
 804     ;;
 805   hppa*64*-*-hpux*)
 806     noconfigdirs="$noconfigdirs target-libffi"
 807     ;;
 808   hppa*-hp-hpux11*)
 809     ;;
 810   hppa*-*-hpux*)
 811     noconfigdirs="$noconfigdirs target-libffi"
 812     ;;
 813   ia64*-*-*vms*)
 814     noconfigdirs="$noconfigdirs target-libffi"
 815     ;;
 816   i[[3456789]]86-w64-mingw*)
 817     noconfigdirs="$noconfigdirs target-libffi"
 818     ;;
 819   i[[3456789]]86-*-mingw*)
 820     noconfigdirs="$noconfigdirs target-libffi"
 821     ;;
 822   x86_64-*-mingw*)
 823     noconfigdirs="$noconfigdirs target-libffi"
 824     ;;
 825   mmix-*-*)
 826     noconfigdirs="$noconfigdirs target-libffi"
 827     ;;
 828   powerpc-*-aix*)
 829     ;;
 830   rs6000-*-aix*)
 831     ;;
 832   ft32-*-*)
 833     noconfigdirs="$noconfigdirs target-libffi"
 834     ;;
 835   *-*-lynxos*)
 836     noconfigdirs="$noconfigdirs target-libffi"
 837     ;;
 838 esac
 839
 840 # Disable the go frontend on systems where it is known to not work. Please keep
 841 # this in sync with contrib/config-list.mk.
 842 case "${target}" in
 843 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 844     unsupported_languages="$unsupported_languages go"
 845     ;;
 846 esac
 847
 848 # Only allow gdbserver on some systems.
 849 if test -d ${srcdir}/gdbserver; then
 850     if test x$enable_gdbserver = x; then
 851         AC_MSG_CHECKING([for gdbserver support])
 852         if (srcdir=${srcdir}/gdbserver; \
 853                 . ${srcdir}/configure.srv; \
 854                 test -n "$UNSUPPORTED")
 855         then
 856             AC_MSG_RESULT([no])
 857             noconfigdirs="$noconfigdirs gdbserver"
 858         else
 859             AC_MSG_RESULT([yes])
 860         fi
 861     fi
 862 fi
 863
 864 # Disable libgo for some systems where it is known to not work.
 865 # For testing, you can easily override this with --enable-libgo.
 866 if test x$enable_libgo = x; then
 867     case "${target}" in
 868     *-*-darwin*)
 869         # PR 46986
 870         noconfigdirs="$noconfigdirs target-libgo"
 871         ;;
 872     *-*-cygwin* | *-*-mingw*)
 873         noconfigdirs="$noconfigdirs target-libgo"
 874         ;;
 875     bpf-*-*)
 876         noconfigdirs="$noconfigdirs target-libgo"
 877         ;;
 878     esac
 879 fi
 880
 881 # Default libgloss CPU subdirectory.
 882 libgloss_dir="$target_cpu"
 883
 884 case "${target}" in
 885   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 886     libgloss_dir=wince
 887     ;;
 888   aarch64*-*-* )
 889     libgloss_dir=aarch64
 890     ;;
 891   arm*-*-*)
 892     libgloss_dir=arm
 893     ;;
 894   cris-*-* | crisv32-*-*)
 895     libgloss_dir=cris
 896     ;;
 897   hppa*-*-*)
 898     libgloss_dir=pa
 899     ;;
 900   i[[3456789]]86-*-*)
 901     libgloss_dir=i386
 902     ;;
 903   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 904     libgloss_dir=m68hc11
 905     ;;
 906   m68*-*-* | fido-*-*)
 907     libgloss_dir=m68k
 908     ;;
 909   mips*-*-*)
 910     libgloss_dir=mips
 911     ;;
 912   powerpc*-*-*)
 913     libgloss_dir=rs6000
 914     ;;
 915   pru-*-*)
 916     libgloss_dir=pru
 917     ;;
 918   sparc*-*-*)
 919     libgloss_dir=sparc
 920     ;;
 921 esac
 922
 923 # Disable newlib and libgloss for various target OSes.
 924 case "${target}" in
 925   alpha*-dec-osf*)
 926     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 927     ;;
 928   i[[3456789]]86-*-linux*)
 929     # This section makes it possible to build newlib natively on linux.
 930     # If we are using a cross compiler then don't configure newlib.
 931     if test x${is_cross_compiler} != xno ; then
 932       noconfigdirs="$noconfigdirs target-newlib"
 933     fi
 934     noconfigdirs="$noconfigdirs target-libgloss"
 935     # If we are not using a cross compiler, do configure newlib.
 936     # Note however, that newlib will only be configured in this situation
 937     # if the --with-newlib option has been given, because otherwise
 938     # 'target-newlib' will appear in skipdirs.
 939     ;;
 940   i[[3456789]]86-*-rdos*)
 941     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 942     ;;
 943   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 944     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 945     ;;
 946   sparc-*-sunos4*)
 947     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 948     ;;
 949   bpf-*-*)
 950     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 951     ;;
 952   *-*-aix*)
 953     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 954     ;;
 955   *-*-beos*)
 956     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 957     ;;
 958   *-*-chorusos)
 959     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 960     ;;
 961   *-*-dragonfly*)
 962     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 963     ;;
 964   *-*-freebsd*)
 965     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 966     ;;
 967   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 968     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 969     ;;
 970   *-*-lynxos*)
 971     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 972     ;;
 973   *-*-mingw*)
 974     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 975     ;;
 976   *-*-netbsd*)
 977     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 978     ;;
 979   *-*-netware*)
 980     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 981     ;;
 982   *-*-tpf*)
 983     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 984     ;;
 985   *-*-uclinux*)
 986     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 987     ;;
 988   *-*-vxworks*)
 989     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 990     ;;
 991 esac
 992
 993 case "${target}" in
 994   *-*-chorusos)
 995     ;;
 996   aarch64-*-darwin*)
 997     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 998     noconfigdirs="$noconfigdirs sim target-rda"
 999     ;;
1000   amdgcn*-*-*)
1001     ;;
1002   arm-*-darwin*)
1003     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1004     noconfigdirs="$noconfigdirs sim target-rda"
1005     ;;
1006   powerpc-*-darwin*)
1007     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1008     noconfigdirs="$noconfigdirs sim target-rda"
1009     ;;
1010   i[[3456789]]86-*-darwin*)
1011     noconfigdirs="$noconfigdirs ld gprof"
1012     noconfigdirs="$noconfigdirs sim target-rda"
1013     ;;
1014   x86_64-*-darwin[[912]]*)
1015     noconfigdirs="$noconfigdirs ld gas gprof"
1016     noconfigdirs="$noconfigdirs sim target-rda"
1017     ;;
1018   *-*-darwin*)
1019     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1020     noconfigdirs="$noconfigdirs sim target-rda"
1021     ;;
1022   *-*-dragonfly*)
1023     ;;
1024   *-*-freebsd*)
1025     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
1026         && ! test -d ${srcdir}/gmp \
1027         && test -f /usr/local/include/gmp.h; then
1028       with_gmp=/usr/local
1029     fi
1030     ;;
1031   *-*-kaos*)
1032     # Remove unsupported stuff on all kaOS configurations.
1033     noconfigdirs="$noconfigdirs target-libgloss"
1034     ;;
1035   *-*-netbsd*)
1036     ;;
1037   *-*-netware*)
1038     ;;
1039   *-*-phoenix*)
1040     noconfigdirs="$noconfigdirs target-libgloss"
1041     ;;
1042   *-*-rtems*)
1043     noconfigdirs="$noconfigdirs target-libgloss"
1044     ;;
1045     # The tpf target doesn't support gdb yet.
1046   *-*-tpf*)
1047     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1048     ;;
1049   *-*-uclinux*)
1050     noconfigdirs="$noconfigdirs target-rda"
1051     ;;
1052   *-*-vxworks*)
1053     ;;
1054   alpha*-dec-osf*)
1055     # ld works, but does not support shared libraries.
1056     # gas doesn't generate exception information.
1057     noconfigdirs="$noconfigdirs gas ld"
1058     ;;
1059   alpha*-*-*vms*)
1060     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1061     ;;
1062   alpha*-*-*)
1063     # newlib is not 64 bit ready
1064     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1065     ;;
1066   bpf-*-*)
1067     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1068     ;;
1069   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1070     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1071     ;;
1072   arc*-*-*)
1073     noconfigdirs="$noconfigdirs sim"
1074     ;;
1075   arm-*-pe*)
1076     noconfigdirs="$noconfigdirs target-libgloss"
1077     ;;
1078   arm-*-riscix*)
1079     noconfigdirs="$noconfigdirs ld target-libgloss"
1080     ;;
1081   avr-*-*)
1082     if test x${with_avrlibc} != xno; then
1083       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1084     fi
1085     ;;
1086   c4x-*-* | tic4x-*-*)
1087     noconfigdirs="$noconfigdirs target-libgloss"
1088     ;;
1089   tic54x-*-*)
1090     noconfigdirs="$noconfigdirs target-libgloss gdb"
1091     ;;
1092   d10v-*-*)
1093     noconfigdirs="$noconfigdirs target-libgloss"
1094     ;;
1095   d30v-*-*)
1096     noconfigdirs="$noconfigdirs gdb"
1097     ;;
1098   fr30-*-elf*)
1099     noconfigdirs="$noconfigdirs gdb"
1100     ;;
1101   ft32-*-*)
1102     noconfigdirs="$noconfigdirs target-rda gprof"
1103     ;;
1104   moxie-*-*)
1105     noconfigdirs="$noconfigdirs"
1106     ;;
1107   h8300*-*-*)
1108     noconfigdirs="$noconfigdirs target-libgloss"
1109     ;;
1110   h8500-*-*)
1111     noconfigdirs="$noconfigdirs target-libgloss"
1112     ;;
1113   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1114     ;;
1115   hppa*64*-*-hpux*)
1116     noconfigdirs="$noconfigdirs gdb"
1117     ;;
1118   hppa*-*-hpux11*)
1119     noconfigdirs="$noconfigdirs gdb ld"
1120     ;;
1121   hppa*64*-*-linux*)
1122     ;;
1123   hppa*-*-linux*)
1124     ;;
1125   hppa*-*-*elf* | \
1126   hppa*-*-lites* | \
1127   hppa*-*-openbsd* | \
1128   hppa*64*-*-*)
1129     ;;
1130   hppa*-*-pro*)
1131     ;;
1132   hppa*-*-*)
1133     noconfigdirs="$noconfigdirs ld"
1134     ;;
1135   i960-*-*)
1136     noconfigdirs="$noconfigdirs gdb"
1137     ;;
1138   ia64*-*-elf*)
1139     # No gdb support yet.
1140     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1141     ;;
1142   ia64*-**-hpux*)
1143     # No ld support yet.
1144     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1145     ;;
1146   ia64*-*-*vms*)
1147     # No ld support yet.
1148     noconfigdirs="$noconfigdirs libgui itcl ld"
1149     ;;
1150   i[[3456789]]86-w64-mingw*)
1151     ;;
1152   i[[3456789]]86-*-mingw*)
1153     target_configdirs="$target_configdirs target-winsup"
1154     ;;
1155   *-*-cygwin*)
1156     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1157     noconfigdirs="$noconfigdirs target-libgloss"
1158     # always build newlib if winsup directory is present.
1159     if test -d "$srcdir/winsup/cygwin"; then
1160       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1161     elif test -d "$srcdir/newlib"; then
1162       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1163     fi
1164     ;;
1165   i[[3456789]]86-*-pe)
1166     noconfigdirs="$noconfigdirs target-libgloss"
1167     ;;
1168   i[[3456789]]86-*-sco3.2v5*)
1169     # The linker does not yet know about weak symbols in COFF,
1170     # and is not configured to handle mixed ELF and COFF.
1171     noconfigdirs="$noconfigdirs ld target-libgloss"
1172     ;;
1173   i[[3456789]]86-*-sco*)
1174     noconfigdirs="$noconfigdirs gprof target-libgloss"
1175     ;;
1176   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1177     noconfigdirs="$noconfigdirs target-libgloss"
1178     ;;
1179   i[[3456789]]86-*-sysv4*)
1180     noconfigdirs="$noconfigdirs target-libgloss"
1181     ;;
1182   i[[3456789]]86-*-beos*)
1183     noconfigdirs="$noconfigdirs gdb"
1184     ;;
1185   i[[3456789]]86-*-rdos*)
1186     noconfigdirs="$noconfigdirs gdb"
1187     ;;
1188   mmix-*-*)
1189     noconfigdirs="$noconfigdirs gdb"
1190     ;;
1191   mt-*-*)
1192     noconfigdirs="$noconfigdirs sim"
1193     ;;
1194   nfp-*-*)
1195     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1196     noconfigdirs="$noconfigdirs $target_libraries"
1197     ;;
1198   pdp11-*-*)
1199     noconfigdirs="$noconfigdirs gdb gprof"
1200     ;;
1201   powerpc-*-aix*)
1202     # copied from rs6000-*-* entry
1203     noconfigdirs="$noconfigdirs gprof"
1204     ;;
1205   powerpc*-*-winnt* | powerpc*-*-pe*)
1206     target_configdirs="$target_configdirs target-winsup"
1207     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1208     # always build newlib.
1209     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1210     ;;
1211     # This is temporary until we can link against shared libraries
1212   powerpcle-*-solaris*)
1213     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1214     ;;
1215   powerpc-*-beos*)
1216     noconfigdirs="$noconfigdirs gdb"
1217     ;;
1218   rs6000-*-lynxos*)
1219     noconfigdirs="$noconfigdirs gprof"
1220     ;;
1221   rs6000-*-aix*)
1222     noconfigdirs="$noconfigdirs gprof"
1223     ;;
1224   rs6000-*-*)
1225     noconfigdirs="$noconfigdirs gprof"
1226     ;;
1227   m68k-apollo-*)
1228     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1229     ;;
1230   microblaze*)
1231     noconfigdirs="$noconfigdirs gprof"
1232     ;;
1233   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1234     if test x$with_newlib = xyes; then
1235       noconfigdirs="$noconfigdirs gprof"
1236     fi
1237     ;;
1238   mips*-*-irix5*)
1239     noconfigdirs="$noconfigdirs gprof target-libgloss"
1240     ;;
1241   mips*-*-irix6*)
1242     noconfigdirs="$noconfigdirs gprof target-libgloss"
1243     ;;
1244   mips*-*-bsd*)
1245     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1246     ;;
1247   mips*-*-linux*)
1248     ;;
1249   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1250   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1251     noconfigdirs="$noconfigdirs ld gas gprof"
1252     ;;
1253   mips*-*-*)
1254     noconfigdirs="$noconfigdirs gprof"
1255     ;;
1256   nvptx*-*-*)
1257     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1258     ;;
1259   sh-*-*)
1260     case "${target}" in
1261       sh*-*-elf)
1262          ;;
1263       *)
1264          noconfigdirs="$noconfigdirs target-libgloss" ;;
1265     esac
1266     ;;
1267   sparc-*-sunos4*)
1268     if test x${is_cross_compiler} = xno ; then
1269            use_gnu_ld=no
1270     fi
1271     ;;
1272   tic6x-*-*)
1273     noconfigdirs="$noconfigdirs sim"
1274     ;;
1275   tilepro*-*-* | tilegx*-*-*)
1276     noconfigdirs="$noconfigdirs sim"
1277     ;;
1278   v810-*-*)
1279     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1280     ;;
1281   vax-*-*)
1282     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1283     ;;
1284   wasm32-*-*)
1285     noconfigdirs="$noconfigdirs ld"
1286     ;;
1287 esac
1288
1289 # If we aren't building newlib, then don't build libgloss, since libgloss
1290 # depends upon some newlib header files.
1291 case "${noconfigdirs}" in
1292   *target-libgloss*) ;;
1293   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1294 esac
1295
1296 # Work in distributions that contain no compiler tools, like Autoconf.
1297 host_makefile_frag=/dev/null
1298 if test -d ${srcdir}/config ; then
1299 case "${host}" in
1300   i[[3456789]]86-*-msdosdjgpp*)
1301     host_makefile_frag="config/mh-djgpp"
1302     ;;
1303   *-cygwin*)
1304     ACX_CHECK_CYGWIN_CAT_WORKS
1305     host_makefile_frag="config/mh-cygwin"
1306     ;;
1307   *-mingw*)
1308     host_makefile_frag="config/mh-mingw"
1309     ;;
1310   alpha*-linux*)
1311     host_makefile_frag="config/mh-alpha-linux"
1312     ;;
1313   hppa*-hp-hpux10*)
1314     host_makefile_frag="config/mh-pa-hpux10"
1315     ;;
1316   hppa*-hp-hpux*)
1317     host_makefile_frag="config/mh-pa"
1318     ;;
1319   hppa*-*)
1320     host_makefile_frag="config/mh-pa"
1321     ;;
1322   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1323     host_makefile_frag="config/mh-darwin"
1324     ;;
1325   powerpc-*-aix*)
1326     host_makefile_frag="config/mh-ppc-aix"
1327     ;;
1328   rs6000-*-aix*)
1329     host_makefile_frag="config/mh-ppc-aix"
1330     ;;
1331 esac
1332 fi
1333
1334 if test "${build}" != "${host}" ; then
1335   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1336   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1337   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1338   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1339   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1340   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1341   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1342   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1343   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1344   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1345   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1346   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1347   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1348   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1349   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1350 else
1351   AR_FOR_BUILD="\$(AR)"
1352   AS_FOR_BUILD="\$(AS)"
1353   CC_FOR_BUILD="\$(CC)"
1354   CXX_FOR_BUILD="\$(CXX)"
1355   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1356   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1357   GOC_FOR_BUILD="\$(GOC)"
1358   GDC_FOR_BUILD="\$(GDC)"
1359   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1360   LD_FOR_BUILD="\$(LD)"
1361   NM_FOR_BUILD="\$(NM)"
1362   RANLIB_FOR_BUILD="\$(RANLIB)"
1363   WINDRES_FOR_BUILD="\$(WINDRES)"
1364   WINDMC_FOR_BUILD="\$(WINDMC)"
1365 fi
1366
1367 AC_PROG_CC_C99
1368 AC_PROG_CXX
1369
1370 # We must set the default linker to the linker used by gcc for the correct
1371 # operation of libtool.  If LD is not defined and we are using gcc, try to
1372 # set the LD default to the ld used by gcc.
1373 if test -z "$LD"; then
1374   if test "$GCC" = yes; then
1375     case $build in
1376     *-*-mingw*)
1377       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1378     *)
1379       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1380     esac
1381     case $gcc_prog_ld in
1382     # Accept absolute paths.
1383     [[\\/]* | [A-Za-z]:[\\/]*)]
1384       LD="$gcc_prog_ld" ;;
1385     esac
1386   fi
1387 fi
1388
1389 # Check whether -static-libstdc++ -static-libgcc is supported.
1390 have_static_libs=no
1391 if test "$GCC" = yes; then
1392   saved_LDFLAGS="$LDFLAGS"
1393
1394   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1395   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1396   AC_LANG_PUSH(C++)
1397   AC_LINK_IFELSE([AC_LANG_SOURCE([
1398 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1399 #error -static-libstdc++ not implemented
1400 #endif
1401 int main() {}])],
1402     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1403     [AC_MSG_RESULT([no])])
1404   AC_LANG_POP(C++)
1405
1406   LDFLAGS="$saved_LDFLAGS"
1407 fi
1408
1409 ACX_PROG_GNAT
1410 ACX_PROG_GDC
1411 ACX_PROG_CMP_IGNORE_INITIAL
1412
1413 AC_ARG_ENABLE([bootstrap],
1414 [AS_HELP_STRING([--enable-bootstrap],
1415                 [enable bootstrapping @<:@yes if native build@:>@])],,
1416 enable_bootstrap=default)
1417
1418 # Issue errors and warnings for invalid/strange bootstrap combinations.
1419 if test -r $srcdir/gcc/configure; then
1420   have_compiler=yes
1421 else
1422   have_compiler=no
1423 fi
1424
1425 case "$have_compiler:$host:$target:$enable_bootstrap" in
1426   *:*:*:no) ;;
1427
1428   # Default behavior.  Enable bootstrap if we have a compiler
1429   # and we are in a native configuration.
1430   yes:$build:$build:default)
1431     enable_bootstrap=yes ;;
1432
1433   *:*:*:default)
1434     enable_bootstrap=no ;;
1435
1436   # We have a compiler and we are in a native configuration, bootstrap is ok
1437   yes:$build:$build:yes)
1438     ;;
1439
1440   # Other configurations, but we have a compiler.  Assume the user knows
1441   # what he's doing.
1442   yes:*:*:yes)
1443     AC_MSG_WARN([trying to bootstrap a cross compiler])
1444     ;;
1445
1446   # No compiler: if they passed --enable-bootstrap explicitly, fail
1447   no:*:*:yes)
1448     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1449
1450   # Fail if wrong command line
1451   *)
1452     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1453     ;;
1454 esac
1455
1456 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1457 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1458 # require C++11 (or higher).
1459 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1460   CXX="$CXX -std=c++11"
1461 elif test "$have_compiler" = yes; then
1462   AX_CXX_COMPILE_STDCXX(11)
1463
1464   if test "${build}" != "${host}"; then
1465     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1466   fi
1467 fi
1468
1469 AC_ARG_ENABLE([pgo-build],
1470 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1471                 [enable the PGO build])],
1472 [enable_pgo_build=$enableval],
1473 [enable_pgo_build=no])
1474
1475 # Issue errors and warnings for invalid/strange PGO build combinations.
1476 case "$have_compiler:$host:$target:$enable_pgo_build" in
1477   *:*:*:no) ;;
1478
1479   # Allow the PGO build only if we aren't building a compiler and
1480   # we are in a native configuration.
1481   no:$build:$build:yes | no:$build:$build:lto) ;;
1482
1483   # Disallow the PGO bootstrap if we are building a compiler.
1484   yes:*:*:yes | yes:*:*:lto)
1485     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1486
1487   *)
1488     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1489     ;;
1490 esac
1491
1492 if test "$enable_pgo_build" != "no"; then
1493   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1494   old_CFLAGS="$CFLAGS"
1495   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1496   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1497   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1498                     [PGO_BUILD_GEN_CFLAGS=])
1499   CFLAGS="$old_CFLAGS"
1500   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1501     AC_MSG_RESULT([yes])
1502     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1503   else
1504     AC_MSG_RESULT([no])
1505     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1506   fi
1507
1508   if test "$enable_pgo_build" = "lto"; then
1509     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1510     old_CFLAGS="$CFLAGS"
1511     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1512     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1513     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1514                       [PGO_BUILD_LTO_CFLAGS=])
1515     CFLAGS="$old_CFLAGS"
1516     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1517       AC_MSG_RESULT([yes])
1518     else
1519       AC_MSG_RESULT([no])
1520       AC_MSG_WARN([LTO is disabled for the PGO build])
1521     fi
1522   fi
1523 fi
1524 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1525 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1526 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1527
1528 # Used for setting $lt_cv_objdir
1529 _LT_CHECK_OBJDIR
1530
1531 # Check for GMP, MPFR and MPC
1532 gmplibs="-lmpc -lmpfr -lgmp"
1533 gmpinc=
1534 have_gmp=no
1535
1536 # Specify a location for mpc
1537 # check for this first so it ends up on the link line before mpfr.
1538 AC_ARG_WITH(mpc,
1539 [AS_HELP_STRING([--with-mpc=PATH],
1540                 [specify prefix directory for installed MPC package.
1541                  Equivalent to --with-mpc-include=PATH/include
1542                  plus --with-mpc-lib=PATH/lib])])
1543 AC_ARG_WITH(mpc-include,
1544 [AS_HELP_STRING([--with-mpc-include=PATH],
1545                 [specify directory for installed MPC include files])])
1546 AC_ARG_WITH(mpc-lib,
1547 [AS_HELP_STRING([--with-mpc-lib=PATH],
1548                 [specify directory for the installed MPC library])])
1549
1550 if test "x$with_mpc" != x; then
1551   gmplibs="-L$with_mpc/lib $gmplibs"
1552   gmpinc="-I$with_mpc/include $gmpinc"
1553 fi
1554 if test "x$with_mpc_include" != x; then
1555   gmpinc="-I$with_mpc_include $gmpinc"
1556 fi
1557 if test "x$with_mpc_lib" != x; then
1558   gmplibs="-L$with_mpc_lib $gmplibs"
1559 fi
1560 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1561   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1562   gmpinc='-I$$s/mpc/src '"$gmpinc"
1563   # Do not test the mpc version.  Assume that it is sufficient, since
1564   # it is in the source tree, and the library has not been built yet
1565   # but it would be included on the link line in the version check below
1566   # hence making the test fail.
1567   have_gmp=yes
1568 fi
1569
1570 # Specify a location for mpfr
1571 # check for this first so it ends up on the link line before gmp.
1572 AC_ARG_WITH(mpfr-dir,
1573 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1574 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1575 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1576
1577 AC_ARG_WITH(mpfr,
1578 [AS_HELP_STRING([--with-mpfr=PATH],
1579                 [specify prefix directory for installed MPFR package.
1580                  Equivalent to --with-mpfr-include=PATH/include
1581                  plus --with-mpfr-lib=PATH/lib])])
1582 AC_ARG_WITH(mpfr-include,
1583 [AS_HELP_STRING([--with-mpfr-include=PATH],
1584                 [specify directory for installed MPFR include files])])
1585 AC_ARG_WITH(mpfr-lib,
1586 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1587                 [specify directory for the installed MPFR library])])
1588
1589 if test "x$with_mpfr" != x; then
1590   gmplibs="-L$with_mpfr/lib $gmplibs"
1591   gmpinc="-I$with_mpfr/include $gmpinc"
1592 fi
1593 if test "x$with_mpfr_include" != x; then
1594   gmpinc="-I$with_mpfr_include $gmpinc"
1595 fi
1596 if test "x$with_mpfr_lib" != x; then
1597   gmplibs="-L$with_mpfr_lib $gmplibs"
1598 fi
1599 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1600   # MPFR v3.1.0 moved the sources into a src sub-directory.
1601   if ! test -d ${srcdir}/mpfr/src; then
1602     AC_MSG_ERROR([dnl
1603 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1604   fi
1605   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1606   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1607   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1608   # Do not test the mpfr version.  Assume that it is sufficient, since
1609   # it is in the source tree, and the library has not been built yet
1610   # but it would be included on the link line in the version check below
1611   # hence making the test fail.
1612   have_gmp=yes
1613 fi
1614
1615 # Specify a location for gmp
1616 AC_ARG_WITH(gmp-dir,
1617 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1618 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1619 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1620
1621 AC_ARG_WITH(gmp,
1622 [AS_HELP_STRING([--with-gmp=PATH],
1623                 [specify prefix directory for the installed GMP package.
1624                  Equivalent to --with-gmp-include=PATH/include
1625                  plus --with-gmp-lib=PATH/lib])])
1626 AC_ARG_WITH(gmp-include,
1627 [AS_HELP_STRING([--with-gmp-include=PATH],
1628                 [specify directory for installed GMP include files])])
1629 AC_ARG_WITH(gmp-lib,
1630 [AS_HELP_STRING([--with-gmp-lib=PATH],
1631                 [specify directory for the installed GMP library])])
1632
1633
1634 if test "x$with_gmp" != x; then
1635   gmplibs="-L$with_gmp/lib $gmplibs"
1636   gmpinc="-I$with_gmp/include $gmpinc"
1637 fi
1638 if test "x$with_gmp_include" != x; then
1639   gmpinc="-I$with_gmp_include $gmpinc"
1640 fi
1641 if test "x$with_gmp_lib" != x; then
1642   gmplibs="-L$with_gmp_lib $gmplibs"
1643 fi
1644 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1645   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1646   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1647   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1648   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1649   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1650   # Do not test the gmp version.  Assume that it is sufficient, since
1651   # it is in the source tree, and the library has not been built yet
1652   # but it would be included on the link line in the version check below
1653   # hence making the test fail.
1654   have_gmp=yes
1655 fi
1656
1657 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1658   have_gmp=yes
1659   saved_CFLAGS="$CFLAGS"
1660   CFLAGS="$CFLAGS $gmpinc"
1661   # Check for the recommended and required versions of GMP.
1662   AC_MSG_CHECKING([for the correct version of gmp.h])
1663   AC_TRY_COMPILE([#include "gmp.h"],[
1664   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1665   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1666   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1667   choke me
1668   #endif
1669   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1670   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1671   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1672   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1673   choke me
1674   #endif
1675   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1676    [AC_MSG_RESULT([no]); have_gmp=no])
1677
1678   # If we have GMP, check the MPFR version.
1679   if test x"$have_gmp" = xyes; then
1680     # Check for the recommended and required versions of MPFR.
1681     AC_MSG_CHECKING([for the correct version of mpfr.h])
1682     AC_TRY_COMPILE([#include <gmp.h>
1683     #include <mpfr.h>],[
1684     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1685     choke me
1686     #endif
1687     ], [AC_TRY_COMPILE([#include <gmp.h>
1688     #include <mpfr.h>],[
1689     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1690     choke me
1691     #endif
1692     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1693      [AC_MSG_RESULT([no]); have_gmp=no])
1694   fi
1695
1696   # Check for the MPC header version.
1697   if test x"$have_gmp" = xyes ; then
1698     # Check for the recommended and required versions of MPC.
1699     AC_MSG_CHECKING([for the correct version of mpc.h])
1700     AC_TRY_COMPILE([#include <mpc.h>],[
1701     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1702     choke me
1703     #endif
1704     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1705     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1706     choke me
1707     #endif
1708     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1709      [AC_MSG_RESULT([no]); have_gmp=no])
1710   fi
1711
1712   # Now check the MPFR library.
1713   if test x"$have_gmp" = xyes; then
1714     saved_LIBS="$LIBS"
1715     LIBS="$LIBS $gmplibs"
1716     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1717     AC_TRY_LINK([#include <mpc.h>],[
1718     mpfr_t n;
1719     mpfr_t x;
1720     mpc_t c;
1721     int t;
1722     mpfr_init (n);
1723     mpfr_init (x);
1724     mpfr_atan2 (n, n, x, MPFR_RNDN);
1725     mpfr_erfc (n, x, MPFR_RNDN);
1726     mpfr_subnormalize (x, t, MPFR_RNDN);
1727     mpfr_clear(n);
1728     mpfr_clear(x);
1729     mpc_init2 (c, 53);
1730     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1731     mpc_cosh (c, c, MPC_RNDNN);
1732     mpc_pow (c, c, c, MPC_RNDNN);
1733     mpc_acosh (c, c, MPC_RNDNN);
1734     mpc_clear (c);
1735     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1736     LIBS="$saved_LIBS"
1737   fi
1738
1739   CFLAGS="$saved_CFLAGS"
1740
1741 # The library versions listed in the error message below should match
1742 # the HARD-minimums enforced above.
1743   if test x$have_gmp != xyes; then
1744     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1745 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1746 their locations.  Source code for these libraries can be found at
1747 their respective hosting sites as well as at
1748 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1749 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1750 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1751 make sure that you have installed both the libraries and the header
1752 files.  They may be located in separate packages.])
1753   fi
1754 fi
1755
1756 # Flags needed for both GMP, MPFR and/or MPC.
1757 AC_SUBST(gmplibs)
1758 AC_SUBST(gmpinc)
1759 AC_SUBST(extra_mpfr_configure_flags)
1760 AC_SUBST(extra_mpc_gmp_configure_flags)
1761 AC_SUBST(extra_mpc_mpfr_configure_flags)
1762 AC_SUBST(extra_isl_gmp_configure_flags)
1763
1764 # Libraries to use for stage1 or when not bootstrapping.
1765 AC_ARG_WITH(stage1-libs,
1766 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1767 [if test "$withval" = "no" -o "$withval" = "yes"; then
1768    stage1_libs=
1769  else
1770    stage1_libs=$withval
1771  fi],
1772 [stage1_libs=])
1773 AC_SUBST(stage1_libs)
1774
1775 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1776 # default is yes if gcc is being built; no otherwise.  The reason for
1777 # this default is that gdb is sometimes linked against GNU Source
1778 # Highlight, which is a shared library that uses C++ exceptions.  In
1779 # this case, -static-libstdc++ will cause crashes.
1780 AC_ARG_WITH(static-standard-libraries,
1781 [AS_HELP_STRING([--with-static-standard-libraries],
1782                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1783 [], [with_static_standard_libraries=auto])
1784 if test "$with_static_standard_libraries" = auto; then
1785   with_static_standard_libraries=$have_compiler
1786 fi
1787
1788 # Linker flags to use for stage1 or when not bootstrapping.
1789 AC_ARG_WITH(stage1-ldflags,
1790 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1791 [if test "$withval" = "no" -o "$withval" = "yes"; then
1792    stage1_ldflags=
1793  else
1794    stage1_ldflags=$withval
1795  fi],
1796 [stage1_ldflags=
1797  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1798  # if supported.  But if the user explicitly specified the libraries to use,
1799  # trust that they are doing what they want.
1800  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1801      -a "$have_static_libs" = yes; then
1802    stage1_ldflags="-static-libstdc++ -static-libgcc"
1803  fi])
1804 AC_SUBST(stage1_ldflags)
1805
1806 # Libraries to use for stage2 and later builds.
1807 AC_ARG_WITH(boot-libs,
1808 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1809 [if test "$withval" = "no" -o "$withval" = "yes"; then
1810    poststage1_libs=
1811  else
1812    poststage1_libs=$withval
1813  fi],
1814 [poststage1_libs=])
1815 AC_SUBST(poststage1_libs)
1816
1817 # Linker flags to use for stage2 and later builds.
1818 AC_ARG_WITH(boot-ldflags,
1819 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1820                 [linker flags for stage2 and later])],
1821 [if test "$withval" = "no" -o "$withval" = "yes"; then
1822    poststage1_ldflags=
1823  else
1824    poststage1_ldflags=$withval
1825  fi],
1826 [poststage1_ldflags=
1827  # In stages 2 and 3, default to linking libstdc++ and libgcc
1828  # statically.  But if the user explicitly specified the libraries to
1829  # use, trust that they are doing what they want.
1830  if test "$poststage1_libs" = ""; then
1831    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1832  fi])
1833 AC_SUBST(poststage1_ldflags)
1834
1835 # GCC GRAPHITE dependency isl.
1836 # Basic setup is inlined here, actual checks are in config/isl.m4
1837
1838 AC_ARG_WITH(isl,
1839   [AS_HELP_STRING(
1840    [--with-isl=PATH],
1841    [Specify prefix directory for the installed isl package.
1842     Equivalent to --with-isl-include=PATH/include
1843     plus --with-isl-lib=PATH/lib])])
1844
1845 # Treat --without-isl as a request to disable
1846 # GRAPHITE support and skip all following checks.
1847 if test "x$with_isl" != "xno"; then
1848   # Check for isl
1849   dnl Provide configure switches and initialize islinc & isllibs
1850   dnl with user input.
1851   ISL_INIT_FLAGS
1852   dnl The versions of isl that work for Graphite
1853   ISL_CHECK_VERSION()
1854   dnl Only execute fail-action, if isl has been requested.
1855   ISL_IF_FAILED([
1856     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1857 fi
1858
1859 # If the isl check failed, disable builds of in-tree variant of isl
1860 if test "x$with_isl" = xno ||
1861    test "x$gcc_cv_isl" = xno; then
1862   noconfigdirs="$noconfigdirs isl"
1863   islinc=
1864 fi
1865
1866 AC_SUBST(isllibs)
1867 AC_SUBST(islinc)
1868
1869 # Check for LTO support.
1870 AC_ARG_ENABLE(lto,
1871 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1872 enable_lto=$enableval,
1873 enable_lto=yes; default_enable_lto=yes)
1874
1875 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1876   build_lto_plugin=yes
1877 ],[if test x"$default_enable_lto" = x"yes" ; then
1878     case $target in
1879       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1880       # On other non-ELF platforms, LTO has yet to be validated.
1881       *) enable_lto=no ;;
1882     esac
1883   else
1884   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1885   # It would also be nice to check the binutils support, but we don't
1886   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1887   # warn during gcc/ subconfigure; unless you're bootstrapping with
1888   # -flto it won't be needed until after installation anyway.
1889     case $target in
1890       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1891       *) if test x"$enable_lto" = x"yes"; then
1892         AC_MSG_ERROR([LTO support is not enabled for this target.])
1893         fi
1894       ;;
1895     esac
1896   fi
1897   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1898   # Build it unless LTO was explicitly disabled.
1899   case $target in
1900     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1901     *) ;;
1902   esac
1903 ])
1904
1905 AC_ARG_ENABLE(linker-plugin-configure-flags,
1906   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1907     [additional flags for configuring linker plugins @<:@none@:>@])],
1908   extra_linker_plugin_configure_flags=$enableval,
1909   extra_linker_plugin_configure_flags=)
1910 AC_SUBST(extra_linker_plugin_configure_flags)
1911 AC_ARG_ENABLE(linker-plugin-flags,
1912   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1913     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1914   extra_linker_plugin_flags=$enableval,
1915   extra_linker_plugin_flags=)
1916 AC_SUBST(extra_linker_plugin_flags)
1917
1918 # Enable --enable-host-shared.
1919 # Checked early to determine whether jit is an 'all' language
1920 AC_ARG_ENABLE(host-shared,
1921 [AS_HELP_STRING([--enable-host-shared],
1922                 [build host code as shared libraries])],
1923 [host_shared=$enableval
1924  case $target in
1925    x86_64-*-darwin* | aarch64-*-darwin*)
1926      if test x$host_shared != xyes ; then
1927        # PIC is the default, and actually cannot be switched off.
1928        echo configure.ac: warning: PIC code is required for the configured target, host-shared setting ignored. 1>&2
1929        host_shared=yes
1930      fi ;;
1931   *) ;;
1932  esac],
1933 [case $target in
1934   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1935   *) host_shared=no ;;
1936  esac])
1937 AC_SUBST(host_shared)
1938
1939 # By default, C and C++ are the only stage 1 languages.
1940 stage1_languages=,c,
1941
1942 # Target libraries that we bootstrap.
1943 bootstrap_target_libs=,target-libgcc,
1944
1945 # Figure out what language subdirectories are present.
1946 # Look if the user specified --enable-languages="..."; if not, use
1947 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1948 # go away some day.
1949 # NB:  embedded tabs in this IF block -- do not untabify
1950 if test -d ${srcdir}/gcc; then
1951   if test x"${enable_languages+set}" != xset; then
1952     if test x"${LANGUAGES+set}" = xset; then
1953       enable_languages="${LANGUAGES}"
1954         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1955     else
1956       enable_languages=default
1957     fi
1958   else
1959     if test x"${enable_languages}" = x ||
1960        test x"${enable_languages}" = xyes;
1961        then
1962       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1963       exit 1
1964     fi
1965   fi
1966   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1967
1968   # 'f95' is the old name for the 'fortran' language. We issue a warning
1969   # and make the substitution.
1970   case ,${enable_languages}, in
1971     *,f95,*)
1972       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1973       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1974       ;;
1975   esac
1976
1977   # If bootstrapping, C++ must be enabled.
1978   case ",$enable_languages,:$enable_bootstrap" in
1979     *,c++,*:*) ;;
1980     *:yes)
1981       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1982         enable_languages="${enable_languages},c++"
1983       else
1984         AC_MSG_ERROR([bootstrapping requires c++ sources])
1985       fi
1986       ;;
1987   esac
1988
1989   # First scan to see if an enabled language requires some other language.
1990   # We assume that a given config-lang.in will list all the language
1991   # front ends it requires, even if some are required indirectly.
1992   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1993     case ${lang_frag} in
1994       ..) ;;
1995       # The odd quoting in the next line works around
1996       # an apparent bug in bash 1.12 on linux.
1997       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1998       *)
1999         # From the config-lang.in, get $language, $lang_requires, and
2000         # $lang_requires_boot_languages.
2001         language=
2002         lang_requires=
2003         lang_requires_boot_languages=
2004         # set srcdir during sourcing lang_frag to the gcc dir.
2005         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
2006         # polutes this shell
2007         saved_srcdir=${srcdir}
2008         srcdir=${srcdir}/gcc . ${lang_frag}
2009         srcdir=${saved_srcdir}
2010         for other in ${lang_requires} ${lang_requires_boot_languages}; do
2011           case ,${enable_languages}, in
2012             *,$other,*) ;;
2013             *,default,*) ;;
2014             *,all,*) ;;
2015             *,$language,*)
2016               echo " \`$other' language required by \`$language'; enabling" 1>&2
2017               enable_languages="${enable_languages},${other}"
2018               ;;
2019           esac
2020         done
2021         for other in ${lang_requires_boot_languages} ; do
2022           if test "$other" != "c"; then
2023             case ,${enable_stage1_languages}, in
2024               *,$other,*) ;;
2025               *,default,*) ;;
2026               *,all,*) ;;
2027               *)
2028                 case ,${enable_languages}, in
2029                   *,$language,*)
2030                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2031                     enable_stage1_languages="$enable_stage1_languages,${other}"
2032                     ;;
2033                 esac
2034                 ;;
2035             esac
2036           fi
2037         done
2038         ;;
2039     esac
2040   done
2041
2042   new_enable_languages=,c,
2043
2044   # If LTO is enabled, add the LTO front end.
2045   if test "$enable_lto" = "yes" ; then
2046     case ,${enable_languages}, in
2047       *,lto,*) ;;
2048       *) enable_languages="${enable_languages},lto" ;;
2049     esac
2050     if test "${build_lto_plugin}" = "yes" ; then
2051       configdirs="$configdirs lto-plugin"
2052     fi
2053   fi
2054
2055   # If we're building an offloading compiler, add the LTO front end.
2056   if test x"$enable_as_accelerator_for" != x ; then
2057     case ,${enable_languages}, in
2058       *,lto,*) ;;
2059       *) enable_languages="${enable_languages},lto" ;;
2060     esac
2061   fi
2062
2063   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2064   potential_languages=,c,
2065
2066   enabled_target_libs=
2067   disabled_target_libs=
2068
2069   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2070     case ${lang_frag} in
2071       ..) ;;
2072       # The odd quoting in the next line works around
2073       # an apparent bug in bash 1.12 on linux.
2074       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2075       *)
2076         # From the config-lang.in, get $language, $target_libs,
2077         # $lang_dirs, $boot_language, and $build_by_default
2078         language=
2079         target_libs=
2080         lang_dirs=
2081         subdir_requires=
2082         boot_language=no
2083         build_by_default=yes
2084         # set srcdir during sourcing.  See above about save & restore
2085         saved_srcdir=${srcdir}
2086         srcdir=${srcdir}/gcc . ${lang_frag}
2087         srcdir=${saved_srcdir}
2088         if test x${language} = x; then
2089           echo "${lang_frag} doesn't set \$language." 1>&2
2090           exit 1
2091         fi
2092
2093         if test "$language" = "c++"; then
2094           boot_language=yes
2095         fi
2096
2097         add_this_lang=no
2098         # C is always enabled, so no need to add it again
2099         if test "$language" != "c"; then
2100           case ,${enable_languages}, in
2101             *,${language},*)
2102               # Language was explicitly selected; include it
2103               add_this_lang=yes
2104               ;;
2105             *,all,*)
2106               # All languages are enabled
2107               add_this_lang=all
2108               ;;
2109             *,default,*)
2110               # 'default' was selected, select it if it is a default language
2111               add_this_lang=${build_by_default}
2112               ;;
2113           esac
2114         fi
2115
2116         # Disable languages that need other directories if these aren't available.
2117         for i in $subdir_requires; do
2118           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2119           case ${add_this_lang} in
2120             yes)
2121               # Specifically requested language; tell them.
2122               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2123               ;;
2124             all)
2125               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2126               add_this_lang=unsupported
2127               ;;
2128             *)
2129               # Silently disable.
2130               add_this_lang=unsupported
2131               ;;
2132           esac
2133         done
2134
2135         # Disable Ada if no preexisting GNAT is available.
2136         case ${add_this_lang}:${language}:${have_gnat} in
2137           yes:ada:no)
2138             # Specifically requested language; tell them.
2139             AC_MSG_ERROR([GNAT is required to build $language])
2140             ;;
2141           all:ada:no)
2142             AC_MSG_WARN([GNAT is required to build $language])
2143             add_this_lang=unsupported
2144             ;;
2145           *:ada:no)
2146             # Silently disable.
2147             add_this_lang=unsupported
2148             ;;
2149         esac
2150
2151         # Disable D if no preexisting GDC is available.
2152         case ${add_this_lang}:${language}:${have_gdc} in
2153           yes:d:no)
2154             # Specifically requested language; tell them.
2155             AC_MSG_ERROR([GDC is required to build $language])
2156            ;;
2157           all:d:no)
2158             AC_MSG_WARN([GDC is required to build $language])
2159             add_this_lang=unsupported
2160             ;;
2161           *:d:no)
2162             # Silently disable.
2163             add_this_lang=unsupported
2164             ;;
2165         esac
2166
2167         # Disable jit if -enable-host-shared not specified
2168         # but not if building for Mingw. All code in Windows
2169         # is position independent code (PIC).
2170         case $target in
2171           *mingw*) ;;
2172           *)
2173           case ${add_this_lang}:${language}:${host_shared} in
2174             yes:jit:no)
2175                    # PR jit/64780: explicitly specify --enable-host-shared
2176             AC_MSG_ERROR([
2177 Enabling language "jit" requires --enable-host-shared.
2178
2179 --enable-host-shared typically slows the rest of the compiler down by
2180 a few %, so you must explicitly enable it.
2181
2182 If you want to build both the jit and the regular compiler, it is often
2183 best to do this via two separate configure/builds, in separate
2184 directories, to avoid imposing the performance cost of
2185 --enable-host-shared on the regular compiler.])
2186                     ;;
2187             all:jit:no)
2188               AC_MSG_WARN([--enable-host-shared required to build $language])
2189               add_this_lang=unsupported
2190               ;;
2191             *:jit:no)
2192               # Silently disable.
2193               add_this_lang=unsupported
2194               ;;
2195                 esac
2196           ;;
2197         esac
2198
2199         # Disable a language that is unsupported by the target.
2200         case "${add_this_lang}: $unsupported_languages " in
2201           no:*) ;;
2202           unsupported:*) ;;
2203           *:*" $language "*)
2204             AC_MSG_WARN([${language} not supported for this target])
2205             add_this_lang=unsupported
2206             ;;
2207         esac
2208
2209         case $add_this_lang in
2210           unsupported)
2211             # Remove language-dependent dirs.
2212             disabled_target_libs="$disabled_target_libs $target_libs"
2213             noconfigdirs="$noconfigdirs $lang_dirs"
2214             ;;
2215           no)
2216             # Remove language-dependent dirs; still show language as supported.
2217             disabled_target_libs="$disabled_target_libs $target_libs"
2218             noconfigdirs="$noconfigdirs $lang_dirs"
2219             potential_languages="${potential_languages}${language},"
2220             ;;
2221           all|yes)
2222             new_enable_languages="${new_enable_languages}${language},"
2223             potential_languages="${potential_languages}${language},"
2224             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2225             enabled_target_libs="$enabled_target_libs $target_libs"
2226             case "${boot_language}:,$enable_stage1_languages," in
2227               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2228                 # Add to (comma-separated) list of stage 1 languages.
2229                 case ",$stage1_languages," in
2230                   *,$language,* | ,yes, | ,all,) ;;
2231                   *) stage1_languages="${stage1_languages}${language}," ;;
2232                 esac
2233                 # We need to bootstrap any supporting libraries.
2234                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2235                 ;;
2236             esac
2237             ;;
2238         esac
2239         ;;
2240     esac
2241   done
2242
2243   # Add target libraries which are only needed for disabled languages
2244   # to noconfigdirs.
2245   if test -n "$disabled_target_libs"; then
2246     for dir in $disabled_target_libs; do
2247       case " $enabled_target_libs " in
2248       *" ${dir} "*) ;;
2249       *) noconfigdirs="$noconfigdirs $dir" ;;
2250       esac
2251     done
2252   fi
2253
2254   AC_ARG_ENABLE(stage1-languages,
2255   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2256                   [choose additional languages to build during
2257                   stage1.  Mostly useful for compiler development])],
2258   [case ,${enable_stage1_languages}, in
2259     ,no,|,,)
2260       # Set it to something that will have no effect in the loop below
2261       enable_stage1_languages=c ;;
2262     ,yes,)
2263       enable_stage1_languages=`echo $new_enable_languages | \
2264         sed -e "s/^,//" -e "s/,$//" ` ;;
2265     *,all,*)
2266       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2267         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2268   esac
2269
2270   # Add "good" languages from enable_stage1_languages to stage1_languages,
2271   # while "bad" languages go in missing_languages.  Leave no duplicates.
2272   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2273     case $potential_languages in
2274       *,$i,*)
2275         case $stage1_languages in
2276           *,$i,*) ;;
2277           *) stage1_languages="$stage1_languages$i," ;;
2278         esac ;;
2279       *)
2280         case $missing_languages in
2281           *,$i,*) ;;
2282           *) missing_languages="$missing_languages$i," ;;
2283         esac ;;
2284      esac
2285   done])
2286
2287   # Remove leading/trailing commas that were added for simplicity
2288   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2289   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2290   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2291   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2292
2293   if test "x$missing_languages" != x; then
2294     AC_MSG_ERROR([
2295 The following requested languages could not be built: ${missing_languages}
2296 Supported languages are: ${potential_languages}])
2297   fi
2298   if test "x$new_enable_languages" != "x$enable_languages"; then
2299     echo The following languages will be built: ${new_enable_languages}
2300     enable_languages="$new_enable_languages"
2301   fi
2302
2303   AC_SUBST(stage1_languages)
2304   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2305 fi
2306
2307 # Handle --disable-<component> generically.
2308 for dir in $configdirs $build_configdirs $target_configdirs ; do
2309   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2310   varname=`echo $dirname | sed -e s/+/_/g`
2311   if eval test x\${enable_${varname}} "=" xno ; then
2312     noconfigdirs="$noconfigdirs $dir"
2313   fi
2314 done
2315
2316 # Check for Boehm's garbage collector
2317 AC_ARG_ENABLE(objc-gc,
2318 [AS_HELP_STRING([--enable-objc-gc],
2319                 [enable use of Boehm's garbage collector with the
2320                  GNU Objective-C runtime])])
2321 AC_ARG_WITH([target-bdw-gc],
2322 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2323                 [specify prefix directory for installed bdw-gc package.
2324                  Equivalent to --with-target-bdw-gc-include=PATH/include
2325                  plus --with-target-bdw-gc-lib=PATH/lib])])
2326 AC_ARG_WITH([target-bdw-gc-include],
2327 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2328                 [specify directories for installed bdw-gc include files])])
2329 AC_ARG_WITH([target-bdw-gc-lib],
2330 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2331                 [specify directories for installed bdw-gc library])])
2332
2333 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2334   AC_MSG_CHECKING([for bdw garbage collector])
2335   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2336     dnl no bdw-gw options, assume default locations
2337     AC_MSG_RESULT([using bdw-gc in default locations])
2338   else
2339     dnl bdw-gw options, first error checking, complete checking in libobjc
2340     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2341       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2342     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2343       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2344     else
2345       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2346     fi
2347   fi
2348 esac
2349
2350 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2351 case ,${enable_languages}, in
2352   *,c++,*)
2353     # Disable libitm, libsanitizer if we're not building libstdc++
2354     case "${noconfigdirs}" in
2355       *target-libstdc++-v3*)
2356         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2357         ;;
2358       *) ;;
2359     esac
2360     ;;
2361   *)
2362     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2363     ;;
2364 esac
2365
2366 # If gcc/ is not in the source tree then we'll not be building a
2367 # target compiler, assume in that case we don't want to build any
2368 # target libraries or tools.
2369 #
2370 # This was added primarily for the benefit for binutils-gdb who reuse
2371 # this configure script, but don't always have target tools available.
2372 if test ! -d ${srcdir}/gcc; then
2373    skipdirs="${skipdirs} ${target_configdirs}"
2374 fi
2375
2376 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2377 # $build_configdirs and $target_configdirs.
2378 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2379
2380 notsupp=""
2381 for dir in . $skipdirs $noconfigdirs ; do
2382   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2383   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2384     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2385     if test -r $srcdir/$dirname/configure ; then
2386       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2387         true
2388       else
2389         notsupp="$notsupp $dir"
2390       fi
2391     fi
2392   fi
2393   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2394     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2395     if test -r $srcdir/$dirname/configure ; then
2396       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2397         true
2398       else
2399         notsupp="$notsupp $dir"
2400       fi
2401     fi
2402   fi
2403   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2404     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2405     if test -r $srcdir/$dirname/configure ; then
2406       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2407         true
2408       else
2409         notsupp="$notsupp $dir"
2410       fi
2411     fi
2412   fi
2413 done
2414
2415 # Quietly strip out all directories which aren't configurable in this tree.
2416 # This relies on all configurable subdirectories being autoconfiscated, which
2417 # is now the case.
2418 build_configdirs_all="$build_configdirs"
2419 build_configdirs=
2420 for i in ${build_configdirs_all} ; do
2421   j=`echo $i | sed -e s/build-//g`
2422   if test -f ${srcdir}/$j/configure ; then
2423     build_configdirs="${build_configdirs} $i"
2424   fi
2425 done
2426
2427 configdirs_all="$configdirs"
2428 configdirs=
2429 for i in ${configdirs_all} ; do
2430   if test -f ${srcdir}/$i/configure ; then
2431     configdirs="${configdirs} $i"
2432   fi
2433 done
2434
2435 target_configdirs_all="$target_configdirs"
2436 target_configdirs=
2437 for i in ${target_configdirs_all} ; do
2438   j=`echo $i | sed -e s/target-//g`
2439   if test -f ${srcdir}/$j/configure ; then
2440     target_configdirs="${target_configdirs} $i"
2441   fi
2442 done
2443
2444 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2445 # so we have to add it after the preceding checks.
2446 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2447 then
2448   case " $configdirs " in
2449     *" libiberty "*)
2450       # If we can build libiberty, we can also build libiberty-linker-plugin.
2451       configdirs="$configdirs libiberty-linker-plugin"
2452       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2453         --with-libiberty=../libiberty-linker-plugin";;
2454     *)
2455       AC_MSG_ERROR([libiberty missing]);;
2456   esac
2457 fi
2458
2459 # Sometimes we have special requirements for the host libiberty.
2460 extra_host_libiberty_configure_flags=
2461 extra_host_zlib_configure_flags=
2462 case " $configdirs " in
2463   *" lto-plugin "* | *" libcc1 "*)
2464     # When these are to be built as shared libraries, the same applies to
2465     # libiberty.
2466     extra_host_libiberty_configure_flags=--enable-shared
2467     ;;
2468   *" bfd "*)
2469     # When bfd is to be built as a shared library, the same applies to
2470     # zlib.
2471     if test "$enable_shared" = "yes"; then
2472       extra_host_zlib_configure_flags=--enable-host-shared
2473     fi
2474     ;;
2475 esac
2476 AC_SUBST(extra_host_libiberty_configure_flags)
2477 AC_SUBST(extra_host_zlib_configure_flags)
2478
2479 # Produce a warning message for the subdirs we can't configure.
2480 # This isn't especially interesting in the Cygnus tree, but in the individual
2481 # FSF releases, it's important to let people know when their machine isn't
2482 # supported by the one or two programs in a package.
2483
2484 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2485   # If $appdirs is non-empty, at least one of those directories must still
2486   # be configured, or we error out.  (E.g., if the gas release supports a
2487   # specified target in some subdirs but not the gas subdir, we shouldn't
2488   # pretend that all is well.)
2489   if test -n "$appdirs" ; then
2490     for dir in $appdirs ; do
2491       if test -r $dir/Makefile.in ; then
2492         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2493           appdirs=""
2494           break
2495         fi
2496         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2497           appdirs=""
2498           break
2499         fi
2500       fi
2501     done
2502     if test -n "$appdirs" ; then
2503       echo "*** This configuration is not supported by this package." 1>&2
2504       exit 1
2505     fi
2506   fi
2507   # Okay, some application will build, or we don't care to check.  Still
2508   # notify of subdirs not getting built.
2509   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2510   echo "    ${notsupp}" 1>&2
2511   echo "    (Any other directories should still work fine.)" 1>&2
2512 fi
2513
2514 case "$host" in
2515   *msdosdjgpp*)
2516     enable_gdbtk=no ;;
2517 esac
2518
2519 # To find our prefix, in gcc_cv_tool_prefix.
2520 ACX_TOOL_DIRS
2521
2522 copy_dirs=
2523
2524 AC_ARG_WITH([build-sysroot],
2525   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2526                   [use sysroot as the system root during the build])],
2527   [if test x"$withval" != x ; then
2528      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2529    fi],
2530   [SYSROOT_CFLAGS_FOR_TARGET=])
2531 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2532
2533 AC_ARG_WITH([debug-prefix-map],
2534   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2535                   [map A to B, C to D ... in debug information])],
2536   [if test x"$withval" != x; then
2537      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2538      for debug_map in $withval; do
2539        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2540      done
2541    fi],
2542   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2543 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2544
2545 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2546 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2547 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2548 # We want to ensure that TARGET libraries (which we know are built with
2549 # gcc) are built with "-O2 -g", so include those options when setting
2550 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2551 if test "x$CFLAGS_FOR_TARGET" = x; then
2552   if test "x${is_cross_compiler}" = xyes; then
2553     CFLAGS_FOR_TARGET="-g -O2"
2554   else
2555     CFLAGS_FOR_TARGET=$CFLAGS
2556     case " $CFLAGS " in
2557       *" -O2 "*) ;;
2558       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2559     esac
2560     case " $CFLAGS " in
2561       *" -g "* | *" -g3 "*) ;;
2562       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2563     esac
2564   fi
2565 fi
2566 AC_SUBST(CFLAGS_FOR_TARGET)
2567
2568 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2569   if test "x${is_cross_compiler}" = xyes; then
2570     CXXFLAGS_FOR_TARGET="-g -O2"
2571   else
2572     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2573     case " $CXXFLAGS " in
2574       *" -O2 "*) ;;
2575       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2576     esac
2577     case " $CXXFLAGS " in
2578       *" -g "* | *" -g3 "*) ;;
2579       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2580     esac
2581   fi
2582 fi
2583 AC_SUBST(CXXFLAGS_FOR_TARGET)
2584
2585 AC_SUBST(LDFLAGS_FOR_TARGET)
2586
2587 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2588 # the named directory are copied to $(tooldir)/sys-include.
2589 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2590   if test x${is_cross_compiler} = xno ; then
2591     echo 1>&2 '***' --with-headers is only supported when cross compiling
2592     exit 1
2593   fi
2594   if test x"${with_headers}" != xyes ; then
2595     x=${gcc_cv_tool_prefix}
2596     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2597   fi
2598 fi
2599
2600 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2601 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2602 # are permitted.
2603 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2604   if test x${is_cross_compiler} = xno ; then
2605     echo 1>&2 '***' --with-libs is only supported when cross compiling
2606     exit 1
2607   fi
2608   if test x"${with_libs}" != xyes ; then
2609     # Copy the libraries in reverse order, so that files in the first named
2610     # library override files in subsequent libraries.
2611     x=${gcc_cv_tool_prefix}
2612     for l in ${with_libs}; do
2613       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2614     done
2615   fi
2616 fi
2617
2618 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2619 #
2620 # This is done by determining whether or not the appropriate directory
2621 # is available, and by checking whether or not specific configurations
2622 # have requested that this magic not happen.
2623 #
2624 # The command line options always override the explicit settings in
2625 # configure.ac, and the settings in configure.ac override this magic.
2626 #
2627 # If the default for a toolchain is to use GNU as and ld, and you don't
2628 # want to do that, then you should use the --without-gnu-as and
2629 # --without-gnu-ld options for the configure script.  Similarly, if
2630 # the default is to use the included zlib and you don't want to do that,
2631 # you should use the --with-system-zlib option for the configure script.
2632
2633 if test x${use_gnu_as} = x &&
2634    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2635   with_gnu_as=yes
2636   extra_host_args="$extra_host_args --with-gnu-as"
2637 fi
2638
2639 if test x${use_gnu_ld} = x &&
2640    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2641   with_gnu_ld=yes
2642   extra_host_args="$extra_host_args --with-gnu-ld"
2643 fi
2644
2645 if test x${use_included_zlib} = x &&
2646    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2647   :
2648 else
2649   with_system_zlib=yes
2650   extra_host_args="$extra_host_args --with-system-zlib"
2651 fi
2652
2653 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2654 # can detect this case.
2655
2656 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2657   with_newlib=yes
2658   extra_host_args="$extra_host_args --with-newlib"
2659 fi
2660
2661 # Handle ${copy_dirs}
2662 set fnord ${copy_dirs}
2663 shift
2664 while test $# != 0 ; do
2665   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2666     :
2667   else
2668     echo Copying $1 to $2
2669
2670     # Use the install script to create the directory and all required
2671     # parent directories.
2672     if test -d $2 ; then
2673       :
2674     else
2675       echo >config.temp
2676       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2677     fi
2678
2679     # Copy the directory, assuming we have tar.
2680     # FIXME: Should we use B in the second tar?  Not all systems support it.
2681     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2682
2683     # It is the responsibility of the user to correctly adjust all
2684     # symlinks.  If somebody can figure out how to handle them correctly
2685     # here, feel free to add the code.
2686
2687     echo $1 > $2/COPIED
2688   fi
2689   shift; shift
2690 done
2691
2692 # Determine a target-dependent exec_prefix that the installed
2693 # gcc will search in.  Keep this list sorted by triplet, with
2694 # the *-*-osname triplets last.
2695 md_exec_prefix=
2696 case "${target}" in
2697   i[[34567]]86-pc-msdosdjgpp*)
2698     md_exec_prefix=/dev/env/DJDIR/bin
2699     ;;
2700   *-*-hpux* | \
2701   *-*-nto-qnx* | \
2702   *-*-solaris2*)
2703     md_exec_prefix=/usr/ccs/bin
2704     ;;
2705 esac
2706
2707 extra_arflags_for_target=
2708 extra_nmflags_for_target=
2709 extra_ranlibflags_for_target=
2710 target_makefile_frag=/dev/null
2711 case "${target}" in
2712   spu-*-*)
2713     target_makefile_frag="config/mt-spu"
2714     ;;
2715   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2716     target_makefile_frag="config/mt-sde"
2717     ;;
2718   mipsisa*-*-elfoabi*)
2719     target_makefile_frag="config/mt-mips-elfoabi"
2720     ;;
2721   mips*-*-*linux* | mips*-*-gnu*)
2722     target_makefile_frag="config/mt-mips-gnu"
2723     ;;
2724   nios2-*-elf*)
2725     target_makefile_frag="config/mt-nios2-elf"
2726     ;;
2727   *-*-linux-android*)
2728     target_makefile_frag="config/mt-android"
2729     ;;
2730   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2731     target_makefile_frag="config/mt-gnu"
2732     ;;
2733   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2734     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2735     # commands to handle both 32-bit and 64-bit objects.  These flags are
2736     # harmless if we're using GNU nm or ar.
2737     extra_arflags_for_target=" -X32_64"
2738     extra_nmflags_for_target=" -B -X32_64"
2739     ;;
2740 esac
2741
2742 alphaieee_frag=/dev/null
2743 case $target in
2744   alpha*-*-*)
2745     # This just makes sure to use the -mieee option to build target libs.
2746     # This should probably be set individually by each library.
2747     alphaieee_frag="config/mt-alphaieee"
2748     ;;
2749 esac
2750
2751 # If --enable-target-optspace always use -Os instead of -O2 to build
2752 # the target libraries, similarly if it is not specified, use -Os
2753 # on selected platforms.
2754 ospace_frag=/dev/null
2755 case "${enable_target_optspace}:${target}" in
2756   yes:*)
2757     ospace_frag="config/mt-ospace"
2758     ;;
2759   :d30v-*)
2760     ospace_frag="config/mt-d30v"
2761     ;;
2762   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2763     ospace_frag="config/mt-ospace"
2764     ;;
2765   no:* | :*)
2766     ;;
2767   *)
2768     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2769     ;;
2770 esac
2771
2772 # Some systems (e.g., one of the i386-aix systems the gas testers are
2773 # using) don't handle "\$" correctly, so don't use it here.
2774 tooldir='${exec_prefix}'/${target_noncanonical}
2775 build_tooldir=${tooldir}
2776
2777 # Create a .gdbinit file which runs the one in srcdir
2778 # and tells GDB to look there for source files.
2779
2780 if test -r ${srcdir}/.gdbinit ; then
2781   case ${srcdir} in
2782     .) ;;
2783     *) cat > ./.gdbinit <<EOF
2784 # ${NO_EDIT}
2785 dir ${srcdir}
2786 dir .
2787 source ${srcdir}/.gdbinit
2788 EOF
2789     ;;
2790   esac
2791 fi
2792
2793 # Make sure that the compiler is able to generate an executable.  If it
2794 # can't, we are probably in trouble.  We don't care whether we can run the
2795 # executable--we might be using a cross compiler--we only care whether it
2796 # can be created.  At this point the main configure script has set CC.
2797 we_are_ok=no
2798 echo "int main () { return 0; }" > conftest.c
2799 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2800 if test $? = 0 ; then
2801   if test -s conftest || test -s conftest.exe ; then
2802     we_are_ok=yes
2803   fi
2804 fi
2805 case $we_are_ok in
2806   no)
2807     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2808     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2809     rm -f conftest*
2810     exit 1
2811     ;;
2812 esac
2813 rm -f conftest*
2814
2815 # Decide which environment variable is used to find dynamic libraries.
2816 case "${host}" in
2817   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2818   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2819   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2820   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2821 esac
2822
2823 # On systems where the dynamic library environment variable is PATH,
2824 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2825 # built executables to PATH.
2826 if test "$RPATH_ENVVAR" = PATH; then
2827   GCC_SHLIB_SUBDIR=/shlib
2828 else
2829   GCC_SHLIB_SUBDIR=
2830 fi
2831
2832 # Adjust the toplevel makefile according to whether bootstrap was selected.
2833 case $enable_bootstrap in
2834   yes)
2835     bootstrap_suffix=bootstrap
2836     BUILD_CONFIG=bootstrap-debug
2837     ;;
2838   no)
2839     bootstrap_suffix=no-bootstrap
2840     BUILD_CONFIG=
2841     ;;
2842 esac
2843
2844 AC_MSG_CHECKING(for default BUILD_CONFIG)
2845
2846 AC_ARG_WITH([build-config],
2847   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2848                   [use config/NAME.mk build configuration])],
2849   [case $with_build_config in
2850    yes) with_build_config= ;;
2851    no) with_build_config= BUILD_CONFIG= ;;
2852    esac])
2853
2854 if test "x${with_build_config}" != x; then
2855   BUILD_CONFIG=$with_build_config
2856 else
2857   case $BUILD_CONFIG in
2858   bootstrap-debug)
2859     if echo "int f (void) { return 0; }" > conftest.c &&
2860        ${CC} -c conftest.c &&
2861        mv conftest.o conftest.o.g0 &&
2862        ${CC} -c -g conftest.c &&
2863        mv conftest.o conftest.o.g &&
2864        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2865       :
2866     else
2867       BUILD_CONFIG=
2868     fi
2869     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2870     ;;
2871   esac
2872 fi
2873 AC_MSG_RESULT($BUILD_CONFIG)
2874 AC_SUBST(BUILD_CONFIG)
2875
2876 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2877 AC_MSG_CHECKING([for --enable-vtable-verify])
2878 AC_ARG_ENABLE(vtable-verify,
2879 [AS_HELP_STRING([--enable-vtable-verify],
2880                 [Enable vtable verification feature])],
2881 [case "$enableval" in
2882  yes) enable_vtable_verify=yes ;;
2883  no)  enable_vtable_verify=no ;;
2884  *)   enable_vtable_verify=no;;
2885  esac],
2886 [enable_vtable_verify=no])
2887 AC_MSG_RESULT($enable_vtable_verify)
2888
2889 # Record target_configdirs and the configure arguments for target and
2890 # build configuration in Makefile.
2891 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2892 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2893 bootstrap_fixincludes=no
2894
2895 # If we are building libgomp, bootstrap it.
2896 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2897   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2898 fi
2899
2900 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2901 # or bootstrap-ubsan, bootstrap it.
2902 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2903   case "$BUILD_CONFIG" in
2904     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2905       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2906       bootstrap_fixincludes=yes
2907       ;;
2908   esac
2909 fi
2910
2911 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2912 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2913    test "$enable_vtable_verify" != no; then
2914   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2915 fi
2916
2917 # If we are building libatomic and the list of enabled languages includes the
2918 # D frontend, bootstrap it.
2919 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
2920   case ,${enable_languages}, in
2921     *,d,*)
2922       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
2923       ;;
2924   esac
2925 fi
2926
2927 # Determine whether gdb needs tk/tcl or not.
2928 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2929 # and in that case we want gdb to be built without tk.  Ugh!
2930 # In fact I believe gdb is the *only* package directly dependent on tk,
2931 # so we should be able to put the 'maybe's in unconditionally and
2932 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2933 # 100% sure that that's safe though.
2934
2935 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2936 case "$enable_gdbtk" in
2937   no)
2938     GDB_TK="" ;;
2939   yes)
2940     GDB_TK="${gdb_tk}" ;;
2941   *)
2942     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2943     # distro.  Eventually someone will fix this and move Insight, nee
2944     # gdbtk to a separate directory.
2945     if test -d ${srcdir}/gdb/gdbtk ; then
2946       GDB_TK="${gdb_tk}"
2947     else
2948       GDB_TK=""
2949     fi
2950     ;;
2951 esac
2952 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2953 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2954
2955 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2956 # else does, only include them if one of these is built.  The Makefile
2957 # provides the ordering, so it's enough here to add to the list.
2958 case " ${configdirs} " in
2959   *\ gdb\ *)
2960     configdirs="${configdirs} gnulib gdbsupport"
2961     ;;
2962   *\ gdbserver\ *)
2963     configdirs="${configdirs} gnulib gdbsupport"
2964     ;;
2965   *\ sim\ *)
2966     configdirs="${configdirs} gnulib"
2967     ;;
2968 esac
2969
2970 # Strip out unwanted targets.
2971
2972 # While at that, we remove Makefiles if we were started for recursive
2973 # configuration, so that the top-level Makefile reconfigures them,
2974 # like we used to do when configure itself was recursive.
2975
2976 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2977 # but now we're fixing up the Makefile ourselves with the additional
2978 # commands passed to AC_CONFIG_FILES.  Use separate variables
2979 # extrasub-{build,host,target} not because there is any reason to split
2980 # the substitutions up that way, but only to remain below the limit of
2981 # 99 commands in a script, for HP-UX sed.
2982
2983 # Do not nest @if/@endif or @unless/@endunless pairs, because
2984 # configure will not warn you at all.
2985
2986 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2987   yes:yes:*\ gold\ *:*,c++,*) ;;
2988   yes:yes:*\ gold\ *:*)
2989     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2990     ;;
2991 esac
2992
2993 extrasub_build=
2994 for module in ${build_configdirs} ; do
2995   if test -z "${no_recursion}" \
2996      && test -f ${build_subdir}/${module}/Makefile; then
2997     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2998     rm -f ${build_subdir}/${module}/Makefile
2999   fi
3000   extrasub_build="$extrasub_build
3001 /^@if build-$module\$/d
3002 /^@endif build-$module\$/d
3003 /^@unless build-$module\$/,/^@endunless build-$module\$/d
3004 /^@if build-$module-$bootstrap_suffix\$/d
3005 /^@endif build-$module-$bootstrap_suffix\$/d
3006 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
3007 done
3008 extrasub_host=
3009 for module in ${configdirs} ; do
3010   if test -z "${no_recursion}"; then
3011     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3012       if test -f ${file}; then
3013         echo 1>&2 "*** removing ${file} to force reconfigure"
3014         rm -f ${file}
3015       fi
3016     done
3017   fi
3018   case ${module},${bootstrap_fixincludes} in
3019     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3020     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3021   esac
3022   extrasub_host="$extrasub_host
3023 /^@if $module\$/d
3024 /^@endif $module\$/d
3025 /^@unless $module\$/,/^@endunless $module\$/d
3026 /^@if $module-$host_bootstrap_suffix\$/d
3027 /^@endif $module-$host_bootstrap_suffix\$/d
3028 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3029 done
3030 extrasub_target=
3031 for module in ${target_configdirs} ; do
3032   if test -z "${no_recursion}" \
3033      && test -f ${target_subdir}/${module}/Makefile; then
3034     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3035     rm -f ${target_subdir}/${module}/Makefile
3036   fi
3037
3038   # We only bootstrap target libraries listed in bootstrap_target_libs.
3039   case $bootstrap_target_libs in
3040     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3041     *) target_bootstrap_suffix=no-bootstrap ;;
3042   esac
3043
3044   extrasub_target="$extrasub_target
3045 /^@if target-$module\$/d
3046 /^@endif target-$module\$/d
3047 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3048 /^@if target-$module-$target_bootstrap_suffix\$/d
3049 /^@endif target-$module-$target_bootstrap_suffix\$/d
3050 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3051 done
3052
3053 # Do the final fixup along with target modules.
3054 extrasub_target="$extrasub_target
3055 /^@if /,/^@endif /d
3056 /^@unless /d
3057 /^@endunless /d"
3058
3059 if test "$enable_pgo_build" != "no"; then
3060   extrasub_build="$extrasub_build
3061 /^@if pgo-build\$/d
3062 /^@endif pgo-build\$/d"
3063 fi
3064
3065 # Create the serialization dependencies.  This uses a temporary file.
3066
3067 AC_ARG_ENABLE([serial-configure],
3068 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3069                 [force sequential configuration of
3070                  sub-packages for the host, target or build
3071                  machine, or all sub-packages])])
3072
3073 case ${enable_serial_configure} in
3074   yes)
3075     enable_serial_build_configure=yes
3076     enable_serial_host_configure=yes
3077     enable_serial_target_configure=yes
3078     ;;
3079 esac
3080
3081 # These force 'configure's to be done one at a time, to avoid problems
3082 # with contention over a shared config.cache.
3083 rm -f serdep.tmp
3084 echo '# serdep.tmp' > serdep.tmp
3085 olditem=
3086 test "x${enable_serial_build_configure}" = xyes &&
3087 for item in ${build_configdirs} ; do
3088   case ${olditem} in
3089     "") ;;
3090     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3091   esac
3092   olditem=${item}
3093 done
3094 olditem=
3095 test "x${enable_serial_host_configure}" = xyes &&
3096 for item in ${configdirs} ; do
3097   case ${olditem} in
3098     "") ;;
3099     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3100   esac
3101   olditem=${item}
3102 done
3103 olditem=
3104 test "x${enable_serial_target_configure}" = xyes &&
3105 for item in ${target_configdirs} ; do
3106   case ${olditem} in
3107     "") ;;
3108     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3109   esac
3110   olditem=${item}
3111 done
3112 serialization_dependencies=serdep.tmp
3113 AC_SUBST_FILE(serialization_dependencies)
3114
3115 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3116 # target, nonopt, and variable assignments.  These are the ones we
3117 # might not want to pass down to subconfigures.  The exception being
3118 # --cache-file=/dev/null, which is used to turn off the use of cache
3119 # files altogether, and which should be passed on to subconfigures.
3120 # Also strip program-prefix, program-suffix, and program-transform-name,
3121 # so that we can pass down a consistent program-transform-name.
3122 baseargs=
3123 tbaseargs=
3124 keep_next=no
3125 skip_next=no
3126 eval "set -- $ac_configure_args"
3127 for ac_arg
3128 do
3129   if test X"$skip_next" = X"yes"; then
3130     skip_next=no
3131     continue
3132   fi
3133   if test X"$keep_next" = X"yes"; then
3134     case $ac_arg in
3135       *\'*)
3136         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3137     esac
3138     baseargs="$baseargs '$ac_arg'"
3139     tbaseargs="$tbaseargs '$ac_arg'"
3140     keep_next=no
3141     continue
3142   fi
3143
3144   # Handle separated arguments.  Based on the logic generated by
3145   # autoconf 2.59.
3146   case $ac_arg in
3147     *=* | --config-cache | -C | -disable-* | --disable-* \
3148       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3149       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3150       | -with-* | --with-* | -without-* | --without-* | --x)
3151       separate_arg=no
3152       ;;
3153     -*)
3154       separate_arg=yes
3155       ;;
3156     *)
3157       separate_arg=no
3158       ;;
3159   esac
3160
3161   skip_targ=no
3162   case $ac_arg in
3163 changequote(,)
3164   --with-* | --without-*)
3165     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3166
3167     case $libopt in
3168     *[-_]include)
3169       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3170       ;;
3171     *[-_]lib)
3172       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3173       ;;
3174     *)
3175       lib=$libopt
3176       ;;
3177     esac
3178 changequote([,])
3179
3180     case $lib in
3181     mpc | mpfr | gmp | isl)
3182       # If we're processing --with-$lib, --with-$lib-include or
3183       # --with-$lib-lib, for one of the libs above, and target is
3184       # different from host, don't pass the current argument to any
3185       # target library's configure.
3186       if test x$is_cross_compiler = xyes; then
3187         skip_targ=yes
3188       fi
3189       ;;
3190     esac
3191     ;;
3192   esac
3193
3194   case "$ac_arg" in
3195     --cache-file=/dev/null | \
3196     -cache-file=/dev/null )
3197       # Handled here to avoid the test to skip args below.
3198       baseargs="$baseargs '$ac_arg'"
3199       tbaseargs="$tbaseargs '$ac_arg'"
3200       # Assert: $separate_arg should always be no.
3201       keep_next=$separate_arg
3202       ;;
3203     --no*)
3204       continue
3205       ;;
3206     --c* | \
3207     --sr* | \
3208     --ho* | \
3209     --bu* | \
3210     --t* | \
3211     --program-* | \
3212     -cache_file* | \
3213     -srcdir* | \
3214     -host* | \
3215     -build* | \
3216     -target* | \
3217     -program-prefix* | \
3218     -program-suffix* | \
3219     -program-transform-name* )
3220       skip_next=$separate_arg
3221       continue
3222       ;;
3223     -*)
3224       # An option.  Add it.
3225       case $ac_arg in
3226         *\'*)
3227           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3228       esac
3229       baseargs="$baseargs '$ac_arg'"
3230       if test X"$skip_targ" = Xno; then
3231         tbaseargs="$tbaseargs '$ac_arg'"
3232       fi
3233       keep_next=$separate_arg
3234       ;;
3235     *)
3236       # Either a variable assignment, or a nonopt (triplet).  Don't
3237       # pass it down; let the Makefile handle this.
3238       continue
3239       ;;
3240   esac
3241 done
3242 # Remove the initial space we just introduced and, as these will be
3243 # expanded by make, quote '$'.
3244 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3245
3246 # Add in --program-transform-name, after --program-prefix and
3247 # --program-suffix have been applied to it.  Autoconf has already
3248 # doubled dollar signs and backslashes in program_transform_name; we want
3249 # the backslashes un-doubled, and then the entire thing wrapped in single
3250 # quotes, because this will be expanded first by make and then by the shell.
3251 # Also, because we want to override the logic in subdir configure scripts to
3252 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3253 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3254 ${program_transform_name}
3255 EOF_SED
3256 gcc_transform_name=`cat conftestsed.out`
3257 rm -f conftestsed.out
3258 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3259 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3260 if test "$silent" = yes; then
3261   baseargs="$baseargs --silent"
3262   tbaseargs="$tbaseargs --silent"
3263 fi
3264 baseargs="$baseargs --disable-option-checking"
3265 tbaseargs="$tbaseargs --disable-option-checking"
3266
3267 # Record and document user additions to sub configure arguments.
3268 AC_ARG_VAR([build_configargs],
3269            [additional configure arguments for build directories])
3270 AC_ARG_VAR([host_configargs],
3271            [additional configure arguments for host directories])
3272 AC_ARG_VAR([target_configargs],
3273            [additional configure arguments for target directories])
3274
3275 # For the build-side libraries, we just need to pretend we're native,
3276 # and not use the same cache file.  Multilibs are neither needed nor
3277 # desired.  We can't even use the same cache file for all build-side
3278 # libraries, as they're compiled differently; some with C, some with
3279 # C++ or with different feature-enabling options.
3280 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3281
3282 # For host modules, accept cache file option, or specification as blank.
3283 case "${cache_file}" in
3284 "") # empty
3285   cache_file_option="" ;;
3286 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3287   cache_file_option="--cache-file=${cache_file}" ;;
3288 *) # relative path
3289   cache_file_option="--cache-file=../${cache_file}" ;;
3290 esac
3291
3292 # Host dirs don't like to share a cache file either, horribly enough.
3293 # This seems to be due to autoconf 2.5x stupidity.
3294 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3295
3296 target_configargs="$target_configargs ${tbaseargs}"
3297
3298 # Passing a --with-cross-host argument lets the target libraries know
3299 # whether they are being built with a cross-compiler or being built
3300 # native.  However, it would be better to use other mechanisms to make the
3301 # sorts of decisions they want to make on this basis.  Please consider
3302 # this option to be deprecated.  FIXME.
3303 if test x${is_cross_compiler} = xyes ; then
3304   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3305 fi
3306
3307 # Special user-friendly check for native x86_64-linux build, if
3308 # multilib is not explicitly enabled.
3309 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3310   x86_64-*linux*:yes:$build:$build:)
3311     # Make sure we have a development environment that handles 32-bit
3312     dev64=no
3313     echo "int main () { return 0; }" > conftest.c
3314     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3315     if test $? = 0 ; then
3316       if test -s conftest || test -s conftest.exe ; then
3317         dev64=yes
3318       fi
3319     fi
3320     rm -f conftest*
3321     if test x${dev64} != xyes ; then
3322       AC_MSG_ERROR([I suspect your system does not have 32-bit development libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler, rerun configure with --disable-multilib.])
3323     fi
3324     ;;
3325 esac
3326
3327 # Default to --enable-multilib.
3328 if test x${enable_multilib} = x ; then
3329   target_configargs="--enable-multilib ${target_configargs}"
3330 fi
3331
3332 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3333 # changed from the earlier setting of with_newlib.
3334 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3335   target_configargs="--with-newlib ${target_configargs}"
3336 fi
3337
3338 # Different target subdirs use different values of certain variables
3339 # (notably CXX).  Worse, multilibs use *lots* of different values.
3340 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3341 # it doesn't automatically accept command-line overrides of them.
3342 # This means it's not safe for target subdirs to share a cache file,
3343 # which is disgusting, but there you have it.  Hopefully this can be
3344 # fixed in future.  It's still worthwhile to use a cache file for each
3345 # directory.  I think.
3346
3347 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3348 # We need to pass --target, as newer autoconf's requires consistency
3349 # for target_alias and gcc doesn't manage it consistently.
3350 target_configargs="--cache-file=./config.cache ${target_configargs}"
3351
3352 FLAGS_FOR_TARGET=
3353 case " $target_configdirs " in
3354  *" newlib "*)
3355   case " $target_configargs " in
3356   *" --with-newlib "*)
3357    case "$target" in
3358     *-cygwin*)
3359       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3360       ;;
3361    esac
3362
3363    # If we're not building GCC, don't discard standard headers.
3364    if test -d ${srcdir}/gcc; then
3365      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3366
3367      if test "${build}" != "${host}"; then
3368        # On Canadian crosses, CC_FOR_TARGET will have already been set
3369        # by `configure', so we won't have an opportunity to add -Bgcc/
3370        # to it.  This is right: we don't want to search that directory
3371        # for binaries, but we want the header files in there, so add
3372        # them explicitly.
3373        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3374
3375        # Someone might think of using the pre-installed headers on
3376        # Canadian crosses, in case the installed compiler is not fully
3377        # compatible with the compiler being built.  In this case, it
3378        # would be better to flag an error than risking having
3379        # incompatible object files being constructed.  We can't
3380        # guarantee that an error will be flagged, but let's hope the
3381        # compiler will do it, when presented with incompatible header
3382        # files.
3383      fi
3384    fi
3385
3386    case "${target}-${is_cross_compiler}" in
3387    i[[3456789]]86-*-linux*-no)
3388       # Here host == target, so we don't need to build gcc,
3389       # so we don't want to discard standard headers.
3390       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3391       ;;
3392    *)
3393       # If we're building newlib, use its generic headers last, but search
3394       # for any libc-related directories first (so make it the last -B
3395       # switch).
3396       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3397
3398       # If we're building libgloss, find the startup file, simulator library
3399       # and linker script.
3400       case " $target_configdirs " in
3401         *" libgloss "*)
3402         # Look for startup file, simulator library and maybe linker script.
3403         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3404         # Look for libnosys.a in case the target needs it.
3405         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3406         # Most targets have the linker script in the source directory.
3407         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3408         ;;
3409       esac
3410       ;;
3411    esac
3412    ;;
3413   esac
3414   ;;
3415 esac
3416
3417 case "$target" in
3418   x86_64-*mingw* | *-w64-mingw*)
3419   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3420   # however, use a symlink named 'mingw' in ${prefix} .
3421     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3422     ;;
3423   *-mingw*)
3424   # MinGW can't be handled as Cygwin above since it does not use newlib.
3425     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3426     ;;
3427 esac
3428
3429 # Allow the user to override the flags for
3430 # our build compiler if desired.
3431 if test x"${build}" = x"${host}" ; then
3432   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3433   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3434   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3435   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3436 fi
3437
3438 # On Canadian crosses, we'll be searching the right directories for
3439 # the previously-installed cross compiler, so don't bother to add
3440 # flags for directories within the install tree of the compiler
3441 # being built; programs in there won't even run.
3442 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3443   # Search for pre-installed headers if nothing else fits.
3444   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3445 fi
3446
3447 if test "x${use_gnu_ld}" = x &&
3448    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3449   # Arrange for us to find uninstalled linker scripts.
3450   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3451 fi
3452
3453 # Search for other target-specific linker scripts and such.
3454 case "${target}" in
3455   mep*)
3456     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3457     ;;
3458 esac
3459
3460 # Makefile fragments.
3461 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3462 do
3463   eval fragval=\$$frag
3464   if test $fragval != /dev/null; then
3465     eval $frag=${srcdir}/$fragval
3466   fi
3467 done
3468 AC_SUBST_FILE(host_makefile_frag)
3469 AC_SUBST_FILE(target_makefile_frag)
3470 AC_SUBST_FILE(alphaieee_frag)
3471 AC_SUBST_FILE(ospace_frag)
3472
3473 # Miscellanea: directories, flags, etc.
3474 AC_SUBST(RPATH_ENVVAR)
3475 AC_SUBST(GCC_SHLIB_SUBDIR)
3476 AC_SUBST(tooldir)
3477 AC_SUBST(build_tooldir)
3478 AC_SUBST(CONFIGURE_GDB_TK)
3479 AC_SUBST(GDB_TK)
3480 AC_SUBST(INSTALL_GDB_TK)
3481
3482 # Build module lists & subconfigure args.
3483 AC_SUBST(build_configargs)
3484 AC_SUBST(build_configdirs)
3485
3486 # Host module lists & subconfigure args.
3487 AC_SUBST(host_configargs)
3488 AC_SUBST(configdirs)
3489 AC_SUBST(target_configdirs)
3490
3491 # Target module lists & subconfigure args.
3492 AC_SUBST(target_configargs)
3493
3494
3495 # Build tools.
3496 AC_SUBST(AR_FOR_BUILD)
3497 AC_SUBST(AS_FOR_BUILD)
3498 AC_SUBST(CC_FOR_BUILD)
3499 AC_SUBST(CFLAGS_FOR_BUILD)
3500 AC_SUBST(CPP_FOR_BUILD)
3501 AC_SUBST(CPPFLAGS_FOR_BUILD)
3502 AC_SUBST(CXXFLAGS_FOR_BUILD)
3503 AC_SUBST(CXX_FOR_BUILD)
3504 AC_SUBST(DLLTOOL_FOR_BUILD)
3505 AC_SUBST(DSYMUTIL_FOR_BUILD)
3506 AC_SUBST(GFORTRAN_FOR_BUILD)
3507 AC_SUBST(GOC_FOR_BUILD)
3508 AC_SUBST(GDC_FOR_BUILD)
3509 AC_SUBST(LDFLAGS_FOR_BUILD)
3510 AC_SUBST(LD_FOR_BUILD)
3511 AC_SUBST(NM_FOR_BUILD)
3512 AC_SUBST(RANLIB_FOR_BUILD)
3513 AC_SUBST(WINDMC_FOR_BUILD)
3514 AC_SUBST(WINDRES_FOR_BUILD)
3515
3516 # Generate default definitions for YACC, M4, LEX and other programs that run
3517 # on the build machine.  These are used if the Makefile can't locate these
3518 # programs in objdir.
3519 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3520
3521 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3522 case " $build_configdirs " in
3523   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3524 esac
3525
3526 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3527 case " $build_configdirs " in
3528   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3529 esac
3530
3531 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3532 case " $build_configdirs " in
3533   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3534 esac
3535
3536 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3537 case " $build_configdirs " in
3538   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3539   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3540 esac
3541
3542 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3543 case " $build_configdirs " in
3544   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3545 esac
3546
3547 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3548 case " $build_configdirs " in
3549   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3550   *)
3551 changequote(,)
3552     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3553     # higher, else we use the "missing" dummy.
3554     if ${MAKEINFO} --version \
3555        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3556       :
3557     else
3558       MAKEINFO="$MISSING makeinfo"
3559     fi
3560     ;;
3561 changequote([,])
3562 esac
3563
3564 # FIXME: expect and dejagnu may become build tools?
3565
3566 AC_CHECK_PROGS(EXPECT, expect, expect)
3567 case " $configdirs " in
3568   *" expect "*)
3569     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3570     ;;
3571 esac
3572
3573 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3574 case " $configdirs " in
3575   *" dejagnu "*)
3576     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3577     ;;
3578 esac
3579
3580
3581 # Host tools.
3582 NCN_STRICT_CHECK_TOOLS(AR, ar)
3583 NCN_STRICT_CHECK_TOOLS(AS, as)
3584 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3585 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3586 NCN_STRICT_CHECK_TOOLS(LD, ld)
3587 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3588 NCN_STRICT_CHECK_TOOLS(NM, nm)
3589 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3590 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3591 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3592 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3593 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3594 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3595 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3596 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3597 AC_SUBST(CC)
3598 AC_SUBST(CXX)
3599 AC_SUBST(CFLAGS)
3600 AC_SUBST(CXXFLAGS)
3601 AC_SUBST(GDC)
3602 AC_SUBST(GDCFLAGS)
3603
3604 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3605 AR_PLUGIN_OPTION=
3606 RANLIB_PLUGIN_OPTION=
3607 if test -n "$PLUGIN_OPTION"; then
3608   if $AR --help 2>&1 | grep -q "\--plugin"; then
3609     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3610   fi
3611   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3612     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3613   fi
3614 fi
3615 AC_SUBST(AR_PLUGIN_OPTION)
3616 AC_SUBST(RANLIB_PLUGIN_OPTION)
3617
3618 # Target tools.
3619 AC_ARG_WITH([build-time-tools],
3620   [AS_HELP_STRING([--with-build-time-tools=PATH],
3621                   [use given path to find target tools during the build])],
3622   [case x"$withval" in
3623      x/*) ;;
3624      *)
3625        with_build_time_tools=
3626        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3627        ;;
3628    esac],
3629   [with_build_time_tools=])
3630
3631 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3632 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3633 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3634 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3635 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3636 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3637
3638 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3639 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3640 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3641 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3642 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3643 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3644 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3645 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3646 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3647 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3648 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3649 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3650 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3651 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3652 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3653
3654 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3655
3656 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3657 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3658 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3659 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3660 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3661                 [gcc/xg++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `if test -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags; then $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes; else echo -funconfigured-libstdc++-v3 ; fi` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3662                 c++)
3663 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3664                 [gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3665                 c++)
3666 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3667 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3668 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3669 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3670                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3671 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3672                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3673 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3674                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3675 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3676 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3677 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3678 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3679 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3680 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3681 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3682 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3683 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3684 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3685 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3686
3687 AC_SUBST(FLAGS_FOR_TARGET)
3688 AC_SUBST(RAW_CXX_FOR_TARGET)
3689
3690 # Certain tools may need extra flags.
3691 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3692 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3693 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3694
3695 # When building target libraries, except in a Canadian cross, we use
3696 # the same toolchain as the compiler we just built.
3697 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3698 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3699 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3700 if test $host = $build; then
3701   case " $configdirs " in
3702     *" gcc "*)
3703       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3704       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3705       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3706       ;;
3707   esac
3708 fi
3709
3710 AC_SUBST(COMPILER_AS_FOR_TARGET)
3711 AC_SUBST(COMPILER_LD_FOR_TARGET)
3712 AC_SUBST(COMPILER_NM_FOR_TARGET)
3713
3714 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3715 AC_ARG_ENABLE(maintainer-mode,
3716 [AS_HELP_STRING([--enable-maintainer-mode],
3717                 [enable make rules and dependencies not useful
3718                  (and sometimes confusing) to the casual installer])],
3719       USE_MAINTAINER_MODE=$enableval,
3720       USE_MAINTAINER_MODE=no)
3721 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3722 AC_SUBST(MAINTAINER_MODE_TRUE)
3723 AC_SUBST(MAINTAINER_MODE_FALSE)
3724 if test "$USE_MAINTAINER_MODE" = yes; then
3725   MAINTAINER_MODE_TRUE=
3726   MAINTAINER_MODE_FALSE='#'
3727 else
3728   MAINTAINER_MODE_TRUE='#'
3729   MAINTAINER_MODE_FALSE=
3730 fi
3731 MAINT=$MAINTAINER_MODE_TRUE
3732 AC_SUBST(MAINT)dnl
3733
3734 # ---------------------
3735 # GCC bootstrap support
3736 # ---------------------
3737
3738 # Stage specific cflags for build.
3739 stage1_cflags="-g"
3740 case $build in
3741   vax-*-*)
3742     case ${GCC} in
3743       yes) stage1_cflags="-g -Wa,-J" ;;
3744       *) stage1_cflags="-g -J" ;;
3745     esac ;;
3746 esac
3747
3748 AC_SUBST(stage1_cflags)
3749
3750 # Enable --enable-checking in stage1 of the compiler.
3751 AC_ARG_ENABLE(stage1-checking,
3752 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3753                 [choose additional checking for stage1 of the compiler])],
3754 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3755 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3756   # For --disable-checking or implicit --enable-checking=release, avoid
3757   # setting --enable-checking=gc in the default stage1 checking for LTO
3758   # bootstraps.  See PR62077.
3759   case $BUILD_CONFIG in
3760     *lto*)
3761       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3762     *)
3763       stage1_checking=--enable-checking=yes,types;;
3764   esac
3765   if test "x$enable_checking" = x && \
3766      test -d ${srcdir}/gcc && \
3767      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3768     stage1_checking=--enable-checking=yes,types,extra
3769   fi
3770 else
3771   stage1_checking=--enable-checking=$enable_checking,types
3772 fi])
3773 AC_SUBST(stage1_checking)
3774
3775 # Enable -Werror in bootstrap stage2 and later.
3776 AC_ARG_ENABLE(werror,
3777 [AS_HELP_STRING([--enable-werror],
3778                 [enable -Werror in bootstrap stage2 and later])],
3779 [
3780 case ${enable_werror} in
3781   yes) stage2_werror_flag="--enable-werror-always" ;;
3782   *) stage2_werror_flag="" ;;
3783 esac
3784 ],
3785 [
3786 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3787   case $BUILD_CONFIG in
3788   bootstrap-debug)
3789       stage2_werror_flag="--enable-werror-always" ;;
3790   "")
3791       stage2_werror_flag="--enable-werror-always" ;;
3792   esac
3793 fi
3794 ])
3795
3796 AC_SUBST(stage2_werror_flag)
3797
3798 # Specify what files to not compare during bootstrap.
3799
3800 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3801 case "$target" in
3802   hppa*64*-*-hpux*) ;;
3803   hppa*-*-hpux*) compare_exclusions="$compare_exclusions | */libgcc/lib2funcs* | gcc/function-tests.o" ;;
3804   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3805 esac
3806 AC_SUBST(compare_exclusions)
3807
3808 AC_CONFIG_FILES([Makefile],
3809   [sed "$extrasub_build" Makefile |
3810    sed "$extrasub_host" |
3811    sed "$extrasub_target" > mf$$
3812    mv -f mf$$ Makefile],
3813   [extrasub_build="$extrasub_build"
3814    extrasub_host="$extrasub_host"
3815    extrasub_target="$extrasub_target"])
3816 AC_OUTPUT